4 books in series

Weird But True

Weird But True is a 4-book series with 4 released primary works first released in 2009 with contributions by National Geographic Kids.

Weird But True: 300 Outrageous Facts
Weird but True! 2: 300 Outrageous Facts
National Geographic Kids Weird But True! 6: 300 Outrageous Facts
Weird but True! 9