Barney, Roger, Diana and Snubby love solving mysteries and when Miss Pepper takes the children to stay at a village inn by the sea she's hoping for a quiet holiday. But strange things happen at the inn and then an explosion at a nearby submarine base starts a police investigation. The children are determined to find the answers first. Age 8+
This book is part of the Barney Mysteries Books series and is book #4 in the series.