Adler, David A

An introduction to the genius with a curious mind who loved to experiment and who invented the phonograph, light bulb, movie camera, and numerous other items.

Cam and her friend Eric chase the thief of Aunt Katie's wallet through an amusement park and find themselves involved in another case requiring their special detective skills.

Cam Jansen relies upon her photographic memory to help her solve the mystery of who is taking bones from the dinosaur exhibit at the museum.

Cam, Eric, and Aunt Molly go to a rock concert when Cam has to use her photographic memory to catch a thief disguised as a ghost.

A biography of Harriet Tubman, describing her life born a slave, how she escaped slavery, how she became the most famous conductor of the Underground Railroad.