What Was the Hindenburg?

What Were the Salem Witch Trials?

Who Was Maurice Sendak?

What Can a President Really Do?: A Good Answer to a Good Question

What Is Earth Day?: A Good Answer to a Good Question

Where Is Alcatraz?

Who Pays Taxes?: A Good Answer to a Good Question

What Was the Gold Rush?

What Is the Role of the White House Press Secretary?: A Good Answer to a Good Question

Bomb: The Race to Build--and Steal--the World's Most Dangerous Weapon (Newbery Honor Book & National Book Award Finalist)

What Is Immigration?: A Good Answer to a Good Question

NBA Finals

Why Are Women Marching?: A Good Answer to a Good Question

The Dream Keeper and Other Poems

What Is the Panama Canal?

The Day the World Went Nuclear: Dropping the Atom Bomb and the End of World War II in the Pacific

Where Is the Empire State Building?

The Complete Book of Presidents & States, Grades 4 - 6

What Is NATO?: A Good Answer to a Good Question

The Boys in the Boat (Young Readers Adaptation): The True Story of an American Team's Epic Journey to Win Gold at the 1936 Olympics