In the late 1700s, America was a new nation, with a vast west that held secrets: Bones! Enormous animal skeletons were being discovered and Thomas Jefferson needed to know what they were. Funding explorers, including Lewis and Clark, Jefferson sought a complete mastodon skeleton—a discovery which, as this book for readers 5 and up reveals, would also put this upstart young country on the world stage. Using ink and digital media, Jamey Christoph creates brilliantly atmospheric illustrations that show fidelity to both the history and the science of this tale.