Seven prequels

Jim Webb goes to the Florida Keys with his grandfather and becomes embroiled in a mystery involving a dead man and a missing cache of diamonds.

Steve learns about the mysterious death of Tom Thomson and decides to find the artist's missing skull, but when odd things begin happening, he wonders if they are part of his grandfather's plans.

Rennie ends up on a ski trip with grandma and stumbles on a murder plot.

While on a camping trip with his brother and grandfather, Bunny gets mixed up with soldiers involved in a War of 1812 reenactment when his brother's cell phone is stolen.