16 books • 4 series
20 Things You Didn't Know about U.S. Monuments (Did You Know? U.S. History)
20 Things You Didn't Know about the U.S. Flag (Did You Know? U.S. History)
20 Things You Didn't Know about the Presidency (Did You Know? U.S. History)
Did You Know? Earth Science (Did You Know? Earth Science)
20 Things You Didn't Know about Rocks and Gems (Did You Know? Earth Science)
20 Things You Didn't Know about Fossils (Did You Know? Earth Science)
20 Things You Didn't Know about Astronomy (Did You Know? Earth Science)
Edinburgh Castle Is Haunted! (A Haunted History)
Gettysburg Is Haunted! (A Haunted History)
The Queen Mary Is Haunted! (A Haunted History)
Alcatraz Is Haunted! (A Haunted History)
The White House Is Haunted! (A Haunted History)
The Tower of London Is Haunted! (A Haunted History)
The Reason Why I’m Living This Life
Dump Trucks (XL Machines!)
Garbage Trucks (XL Machines!)
