In the sixth book of the Calendar Mysteries - a new early chapter book mystery series featuring the younger siblings of the A to Z Mysteries detectives - Bradley, Brian, Nate and Lucy are getting ready for Father's Day. They've decided that strawberry jam from the Pintos' strawberry patch would be a great gift. But something or someone has been taking bites out of the strawberrys! Polly the Pony, Pal and the dog, and the twins' brother Josh are all suspects. If the kids can't protect the strawberry patch from the mystery chomper, they might be in a real jam!