Book 1

Mysterious Max

by Megan Stine and H. William Stine

Published 21 October 1984

Book 4

Pet Day Surprise

by Megan Stine

Published 4 February 1989

Book 5

Max Onstage

by Megan Stine and H. William Stine

Published 4 February 1989

When Ricky Reyes dares Jeffrey to get a bloody dagger out of the old McGyver house on Halloween night, Jeffrey is counting on Max, his ghostly friend, to help him.

Max Saves the Day

by Megan Stine

Published 1 January 2011