Most Popular Books by Sally M. Walker

What a discovery! Deep under the Atlantic Ocean, divers found a shipwreck like no other. It was the H. L. Hunley, a submarine that had sunk during the Civil War! A team of scientists from all over the world came to work on the discovery. How would they raise the Hunley from the ocean floor? How would they open the submarine? And what would they find inside?

Describes the physical characteristics, life cycle, behavior, and conservation of manatees, also known as sea cows.

Examines the coelacanth, a type of fish that scientists thought had become extinct during the time of dinosaurs, until a live one was discovered in 1938.

This book introduces young readers to volcanoes—what they are, how they form, and how they affect people.

The worst maritime disaster in American history wasn't the Titanic. It was the steamboat Sultana on the Mississippi River and it could have been prevented.

Discusses electricity and currents, including instructions for how to make a circuit and see static electricity at work.

Studying Antarctica has never been for the fainthearted. "Hereabouts died a very gallant gentleman, Captain L. E. G. Oates of the Inniskilling Dragoons. In March 1912, returning from the Pole, he walked willingly to his death in a blizzard to try to save his comrades, beset by hardship." —Inscription on a cross placed near presumed final resting place of Antarctic explorer Lawrence "Titus" Oates, The Terra Nova Expedition, 1910-1913 "We have one survival bag for every two people." —Antarctic paleontologist William Hammer, Transantarctic Vertebrate Paleontology Project, 2004 "When the ice cracks, it can sound like massive thunder rolls that seem to go on forever. If it is a serious cracking in the ice, it literally sounds like canon shots." —Eighth-grade science teacher and Antarctic diver Robin Ellwood, Lake Ecosystems in Antarctica Project, 2008-2009 Humanity's fascination with the land at the bottom of the globe dates back at least to the ancient Romans, who imagined Terra Australis Incognita—the "unknown southern land"—and drew it on their maps even though no one had ever seen it. It took a thousand years for this unknown land to become known. Despite the many people who have since visited it, conquering the Antarctic frontier is a never-ending challenge that calls scientists and explorers to risk their lives in the pursuit of knowledge. Frozen Secrets is the tale of a continent, the inside story of the critical, cutting-edge research that brave men and women from around the world have done and still do in Antarctica. Sally M. Walker traces expeditions from the earliest explorers to today's research stations, where contemporary scientists work in some of the harshest conditions on Earth. Whether they study the formation of polar ice or the stratigraphy of ancient rock or the fossils of newly discovered dinosaurs or the chemistry of air trapped in miniscule frozen bubbles, the scientists working in Antarctica are building a body of knowledge that will influence future generations as they make choices that could affect the course of the whole planet.

The true story of the real bear who inspired Winnie-the-Pooh

Describes the basic physics behind work and simple machinery.

Uses everyday examples to show how wheels and axles function as simple machines.

Describes the 1938 discovery of the coelacanth, a fish previously believed to be extinct, and subsequent research about it.

Looks at levers and uses everyday materials to show how they help make our work easier.

Describes William Hammer's discovery of the first dinosaur remains found in Antarctica.

American chestnut trees were once found far and wide in North America's eastern forests. They towered up to one hundred feet tall, providing food and shelter for people and animals alike. For many, life without the chestnut seemed unimaginable—until disaster struck in the early 1900s. What began as a wound in the bark of a few trees soon turned to an unstoppable killing force. An unknown blight was wiping out the American chestnut, and scientists felt powerless to prevent it. But the story doesn't end there. Today, the American chestnut is making a comeback. Narrative nonfiction master Sally M. Walker tells a tale of loss, restoration, and the triumph of human ingenuity in this beautifully photographed middle-grade book.

Text and pictures describe the Earth's caves, including their different types, animal life, and how people explore them.

110 million years ago, a lush river flowed through the heart of what is now a desert in Africa. Lurking in the depths of the river, a humungous monster waited for its prey to come to the river’s edge to drink...and to die. More than 40 feet long, this giant ancestor of the crocodile stalked and killed dinosaurs. In 1997, dinosaur hunter Paul Sereno discovered the enormous reptile fossil named SuperCroc. Learn how modern science uncovers the ancient past in this thrilling account of a prehistoric predator.

Focusing on simple machines and how they help us do work in our daily lives, this fun, illustrated and informative text introduces young readers to several basic concepts of physics.

"Hits the mark."— Kirkus An engaging middle-grade nonfiction narrative of the American Indian soldiers who bravely fought in the Civil War from Sibert Award-winning author Sally M. Walker. More than 20,000 American Indians served in the Civil War, yet their stories have often been left out of the history books. In Deadly Aim, Sally M. Walker explores the extraordinary lives of Michigan's Anishinaabe sharpshooters. These brave soldiers served with honor and heroism in the line of duty, despite enduring broken treaties, loss of tribal lands, and racism. Filled with fascinating archival photographs, maps, and diagrams, this book offers gripping firsthand accounts from the frontlines. You'll learn about Company K, the elite band of sharpshooters, and Daniel Mwakewenah, the chief who killed more than 32 rebels in a single battle despite being gravely wounded. Walker celebrates the lives of the soldiers whose stories have been left in the margins of history for too long with extensive research and consultation with the Repatriation Department for the Little Traverse Bay Bands of Odawa Indians, the Eyaawing Museum and Cultural Center, and the Ziibiwing Center of Anishinaabe Culture and Lifeways.

Introduces glaciers, including how they were formed, how they move, and their importance to the geography and ecology of the world, and discusses ways that we can reduce the deterioration of the glaciers before it is too late.

What do bicycles, doorknobs, and screwdrivers have in common? All of them use wheels and axles to perform work!