Can you crack the case with six clues or less? Welcome back to Moon Hollow, where mystery lurks around every corner — and four kids have come together to solve crimes and puzzles big and small. When a monster is sighted in the woods surrounding Moon Hollow, Viola, Sylvester, Rosie, and Woodrow know they're in for their creepiest case yet. But it's just one of fourteen mysteries competing for their attention. They'll have to uncover the truth in six clues or less — and readers are invited to guess alongside them each step of the way. Each book comes with an exclusive code so that readers can download a free copy of the e-book...which includes an extra mystery unavailable anywhere else!