Who Was Rosa Parks?

Cleopatra

Who Was Harriet Tubman?

The Trojan War

What Was the Underground Railroad?

Castle: A Caldecott Honor Award Winner

The LEGO Adventure Book, Vol. 2: Spaceships, Pirates, Dragons & More!

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

The LEGO Adventure Book, Vol. 3: Robots, Planes, Cities & More!

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

The Young Investigator's Guide to Ancient Aliens

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

The Art of Construction: Projects and Principles for Beginning Engineers & Architects

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

Meet the Ancient Romans

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

The Legend of Tutankhamun

Courageous

Pyramids and Mummies

What Were the Twin Towers?