Most Popular Books by Dori Hillestad Butler

"My name is King. I am a dog. I am also a detective."



King has a very big mystery to solve. His family is missing, and he's been put in the P-O-U-N-D. Why doesn't his beloved human (Kayla) come to get him? When King is adopted by Connor and his mom, things get more confusing. The new family calls him Buddy!



And just as Connor and Buddy start to get acquainted, Connor disappears! Buddy (aka King) has big problems to solve, but with some help from his friend Mouse (a very large dog) and the mysterious cat with no name, he shows what a smart, brave dog can do.



Mystery fans and dog lovers will be swept up in Dori Hillestad Butler's funny, satisfying story... and left eager for Buddy's next adventure.

There have always been rumors of a ghost at Four Lakes Elementary. On the night of the fourth grade sleepover, Mr. Poe, the custodian, tells the story of Agatha, the girl who haunts the school. Then secret notes, unusual banging, and a ghostly voice invade the sleepover. Buddy is determined to find out if there really is a ghost.

Buddy was adopted from the P-O-U-N-D and he likes his new family, but he's still searching for Kayla-his first family. What has happened to them? He hopes to solve that mystery soon, but right now he's got another urgent case-two dogs, Muffin and Jazzy, have been switched! How can Buddy get poor Muffin and Jazzy back to their real owners?

Investigating a classmate's claim that he saw a ghost backstage while rehearsing for the school play, Kaz and Claire, harboring suspicions that the ghost may be Kaz's mom, discover compelling evidence of otherworldly activities. Investigating a classmate's claim that he saw a ghost backstage while rehearsing for the school play, Kaz and Claire, harboring suspicions that the ghost may be Kaz's mom, discover compelling evidence of otherworldly activities. Book #3

Obtaining the ability to pass through walls without feeling "skizzy," Kaz explores Beckett's secret room at the back of the library and encounters an unexpected mystery.

With a lot of searching and a lot of luck, Kaz has found his dog Cosmo, his little brother Little John, his grandmom, and his grandpops. But what about his parents? Or his big brother Finn? Will he ever see them again? Kaz wants to keep looking for his family, but when Claire hears about a ghost at the fire station, Kaz knows it's a case for C & K Ghost Detectives!

Here is Edgar Award Winner Dori Hillestad Butler's seventh title in her not-too-scary chapter book mystery series, The Haunted Library. Perfect for reluctant readers in the mood for a great mystery!

A group of girls in Claire's town have noticed strange sights and sounds coming from the tree house where their club meets. Is it a rival boys' club trying to scare them away? Or is it a ghost? The girls ask Claire to tackle the mystery—and Kaz hopes to finally find the rest of his missing family members!


From the Trade Paperback edition.

An illustrated young chapter book series full of friendship and mystery from Edgar Award winner Dori Hillestad Butler! When ghost boy Kaz’s haunt is torn down and he is separated from his ghost family, he meets a real girl named Claire, who lives above the town library with her parents and her grandmother. Claire has a special ability to see ghosts when other humans cannot and she and Kaz quickly form a friendship. The two join forces to solve the mystery of the ghost that’s haunting the library. Could it be one of Kaz’s lost family members?

Girls can''t play baseball at Hoover Middle School, but Joelle is determined to find a way to play the game she loves. It''s not fair! Thirteen-year-old Joelle Cunningham is passionate about baseball. When her family moves to the small town of Greendale, Iowa, she quickly discovers that there are strict rules preventing her from playing on the school team. At Hoover Middle School, only boys play baseball. Girls play softball. Joelle tries to tell everyone they''re not the same sport. But no one is listening. Not Coach Carlyle who doesn''t want her on his team, even though they''re at the bottom of the league. Not Ms. Fenner, the softball coach who wants Joelle to use her big-league swing on the girls'' softball team. Not even Jason, her older brother, who is too busy at college to be of much help. Through some creative problem-solving and surprising alliances, Joelle finds a solution to her dilemma that brings the disputing sides together...and baseball to the girls of Greendale. Author Dori Hillestad Butler has created a high-spirited, indomitable character that readers will admire and root for in this story of frustrated ambition and ultimate triumph.

When strange noises are heard in the tree house where their club meets, Claire and Kaz wonder if a rival club is causing problems in order to scare them away, or if they are coming from the ghosts of one of Kaz''s departed ancestors.

A brand-new young chapter book series from Edgar Award winner Dori Hillestad Butler! After successfully solving the mystery of the ghost in the library, Kaz and Claire land the first case for their detective agency—a haunted attic in a neighbor’s home! With a little help from Grannie, Kaz and Claire discover that what appeared to be something spooky has a much simpler explanation.

Here is the eighth title in Edgar Award Winner Dori Hillestad Butler''s not-too-scary chapter book mystery series, The Haunted Library. Kaz are Claire are called on for another case! A family thinks their house is haunted, making it difficult for them to sell it. Will Kaz and Claire be able to figure out what''s going on, and find more of Kaz''s family members along the way?

When Samantha was three, her twin sister died, her parents divorced, and her father left. Sam''s life has never been the same. Now that she''s thirteen, Sam can''t stop wondering about her past. Why hasn''t her father tried to contact her all these years? How could he have allowed Sarah to drown? And how can her mother expect her to accept some man she hardly knows as her new father? Samantha already has a father out there. Somewhere. A fateful decision sets into motion a chain of events and confrontations that will change Samantha''s and her family''s lives forever. As she sets out to find her father and discover what really happened the day her sister drowned, she uncovers painful secrets that threaten to destroy her family all over again. Dori Hillestad Butler''s sensitive story draws readers into a suspenseful mystery about a flawed but loving family trying to heal.

Edgar Award Winner Dori Hillestad Butler gives us the tenth—and final!—title in her not-too-scary chapter book mystery series, The Haunted Library, in the form of a super special! It''s almost Halloween, and Kaz and Claire are off to Seattle to visit Claire''s cousins. They explore the local library...and find a ghost living there! The ghost''s family has been missing, so Kaz and Claire decide to investigate. When they discover ghostly activity in the city''s subterranean passages, they put their detective skills to work. Kaz and Claire are on the case!

From Edgar Award Winner Dori Hillestad Butler comes a new chapter book mystery series, The Treasure Troop! Join Marly, Isla, and Sai, three code-cracking kids on the hunt for an old neighbor''s hidden treasure. Marly always knew Mr. Summerling as her friendly neighbor living in the big, old house next-door. Sure, he walked around with a metal detector and talked about being a "treasure hunter," but she didn''t think much of it. But when news of Mr. Summerling''s death arrives at her doorstep, Marly is brought into a treasure hunt of her own. In Mr. Summerling''s will, he''s left a treasure for Marly and her two classmates, Isla and Sai. The catch? They have to solve a series of riddles, puzzles, and clues to find its location. And not only that, they have to work together on it -- which Marly is not looking forward to. But with no other choice, she, Isla, and Sai set off on the hunt. Can the three kids come together to crack the code? And even if they do solve the clues... what could Mr. Summerling possibly have left them?

To rebuild their broken family, a pair of audacious tween cousins must confront the long-buried secrets that destroyed it in this upper middle grade novel told from dual perspectives. Twelve-year-olds Alice and Bee are practically strangers when their grandparents’ anniversary party reunites their estranged families and ignites their own fast friendship. But their reunion doesn’t last long—Bee’s mother and grandfather are dead set on keeping the liberal Seattle faction of the family away from the conservative Minnesota crew. “It’s complicated,” the grown ups tell them over and over (and over!) again. Bee and Alice grow closer despite their geographical distance, determined to keep their friendship going—and to uncover the big family secret. What happened all those years ago, and why did it tear their family apart? Just when they''ve started to make progress, the COVID pandemic strikes. Bee and Alice watch as the world shuts down and their loved ones grow further divided along their fractured lines. Somehow, it’s up to the twelve-year-olds to clean up the mess that the grown ups have made. This powerful, timely story cuts deep, touching on recent historic events and intimate family details alike. With an age-appropriate approach, Rabbit Rabbit tackles religion, sexuality, bodily autonomy, and other juicy stuff you''re not supposed to talk about at Thanksgiving. Readers will fall headfirst for Alice and Bee as the unforgettable tweens make space for their friendship and shifting identities while standing up to their far-from-perfect family, with all the love and grace they can muster.

From Edgar Award Winner Dori Hillestad Butler comes The Treasure Troop, a chapter book mystery series! Join Marly, Sai, and Isla, three code-cracking kids on the hunt for an old neighbor''s hidden treasure. In the fourth and final book of this code-busting series, Marly, Sai, and Isla are back on the hunt. After their shocking discoveries on Summer Island, the Treasure Troop has one final set of clues to follow before reaching the end of their search. And now our trio must solve the toughest mystery of all: what really happened to Mr. Summerling?

King & Kayla are back on the case in this laugh-out-loud mystery from the Theodor Seuss Geisel Honor Award-winning series. Kayla needs to return her library books, but she can''t find one of them. King knows that if they don''t return all the books, they can''t check out more—and that means no new stories. Analytical Kayla retraces her steps, with the assistance of their friend Jillian. Sensitive King smells a library book. Could it be lost in Dad''s chair? Nope, that''s a different book. In fact, it''s a book that belongs to Jillian''s little brother Adam. Can King and Kayla put the pieces together and find the lost library book? With simple, straightforward language and great verbal and visual humor, the King & Kayla series is perfect for newly independent readers. King and Kayla model excellent problem-solving skills, including working as a team, gathering facts, making lists, and evaluating evidence.

The first in a new series featuring King, a lovable dog who helps his girl Kayla solve the mystery of who sent letters, written in code, to Kayla and her friend, Mason. Full color.

Kaz and Claire are back for a timely mystery in this adorable series by Edgar Award winner Dori Hillestad Butler! Kaz and Claire are called in for another ghostly mystery, and this ghost is always right on time. When Claire''s friend tells the young detectives about his five o''clock ghost, Kaz wonders if it could be his own missing brother, Little John. Kaz and Claire search the house up and down, but they can''t find any trace of Little John--or any other ghost. Yet when five o''clock comes along, the strange occurrences come back again...

2012-2013 Iowa Teen Award Master List They just wanted to tell the truth. When Zebby and Amr create the website thetruthabouttruman.com, they want it to be honest. They want it to be about the real Truman Middle School, to say things that the school newspaper would never say, and to give everyone a chance to say what they want to say, too. But given the chance, some people will say anything—anything to hurt someone else. And when rumors about one popular student escalate to cruel new levels, it''s clear the truth about Truman School is more harrowing than anyone ever imagined.

King & Kayla are back on the case in this laugh-out-loud mystery from the Theodor Seuss Geisel Honor Award-winning series. Kayla made peanut butter treats for Thor, Jillian''s new puppy. But now the treats are missing, and King is under suspicion. Analytical Kayla notices that King''s breath doesn''t smell like peanut butter, so he didn''t eat them. Sensitive King detects the presence of an intruder in their house. Is it Jillian''s little brother Adam? Or someone else? Who took the missing dog treats? With simple, straightforward language and great verbal and visual humor, the King & Kayla series is perfect for newly independent readers. King and Kayla model excellent problem-solving skills, including working as a team, gathering facts, making lists, and evaluating evidence.

From Edgar Award Winner Dori Hillestad Butler comes a new chapter book mystery series, The Treasure Troop! Join Marly, Sai, and Isla, three code-cracking kids on the hunt for an old neighbor''s hidden treasure. In the third book of this code-busting series, Marly, Sai, and Isla are back on the hunt! Mr. Summerling has left them a brand-new set of clues to follow, including tickets to the mysterious Summer Island. So with tickets in hand, our trio sets off to their late neighbor''s island. Can they finally discover what lies at the end of this treasure hunt?

Buddy has settled with his adopted family, but he''s never given up on finding his beloved human, Kayla, and his first family. One night he sees men taking things out of Kayla''s old house and loading them into a van. What''s up? Though his friend Mouse advises against it, in the middle of the night Buddy decides to make a daring move, leaving everything he knows behind. Dori Butler''s third case in The Buddy Files will entertain and satisfy the many fans of this brave, funny, and loyal dog.