When the class goes online to invite their favorite author, D. B. Spooks, to visit their school, someone starts sending scary messages over the school computer, and their invisible companion must help
In an easy reader mystery, Invisible Inc. has a puzzle to solve when the prize-winning paper Charlene is supposed to read at Parents' Night disappears. Original.
When snacks begin to mysteriously disappear from classroom lunch bags, an invisible boy and his friends seek out the culprit, in a third installment in the Invisible Inc. Hello Reader series. Original
