Bermuda Triangle (Unsolved)

Who Was Jesus?

Battlefield Ghosts (True Hauntings #2)

Cleopatra

Captain Kidd's Treasure (Unsolved)

The Trojan War

Ghost Ship (Unsolved)

Castle: A Caldecott Honor Award Winner

Amazing Immortals: A Guide to Gods and Goddesses Around the World

What Were the Twin Towers?

Escape from Alcatraz (Unsolved)

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

Three Cups of Tea

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

The Young Investigator's Guide to Ancient Aliens

Where Is the Great Wall?

Who Was Alexander the Great?

Who Was King Tut?

The Genius of Islam: How Muslims Made the Modern World

Iqbal Masih and the Crusaders Against Child Slavery