The Mattigan kids don’t believe in things that go bump in the night. After all, their dad is famous for proving such things are impossible. But, when their long-lost Grandpa Joe shows up with his Mysterious Monsters journal, begging for help, the siblings find themselves drawn into a search for Bigfoot.
Along the way, they’ll have to deal with meddling babysitters, suspicious psychics, a YouTube disaster, and their furious father. To solve this mystery, Maddie, Max, and Theo must rethink what’s possible ― and make lots of peanut butter and banana sandwiches.
David Michael Slater is an acclaimed author of books for children, teens, and adults. His work for children includes the picture books Cheese Louise!, The Bored Book, The Boy & the Book, the early chapter book series, Mysterious Monsters, and the teen series, Forbidden Books. David’s work for adults includes the hilarious comic-drama, Fun & Games, which The New York Review of Books called “Hilarious,” and the forthcoming non-fiction title, 25 Ideas in Education That Just Don’t Work — And How to Fix Them. David teaches middle school in Nevada, where he lives with his wife and son.