Mostly Ghostly

Mostly Ghostly is a series of books written by children's horror author R. L. Stine.

Its target audience is primarily middle school-aged youths ages 11–14.

The plot revolves around Max, an 11-year-old boy who ends up having the power to see ghosts.

He meets two kids who turned into ghosts and are trying to find their parents.

Nevertheless, Max still tries to help them solve the mystery, and the three encounter various villains and somewhat silly adventures.