Book 2

The invisible boy Chip intends to enter his invisible dog Max in the dog show, but when Max goes missing, Chip and his Invisible Inc. friends suspect foul play.

Book 3

The Snack Attack Mystery

by Elizabeth Levy

Published 1 February 1996

Book 6

Parents' Night Fright

by Elizabeth Levy

Published 1 April 1998
When Charlene's prize-winning paper disappears on Parents' Night, Invisible Inc. comes to the rescue in this illustrated classroom mystery. Full color.