It's mud season in Cape Cod, and when an ill wind blows in a murder with a twist in the tale, bicycle shop owner Mackenzie "Mac" Almeida and her crime-solving book group are ready to leaf through the clues . . . Everyone loves a festival, though Mac has a few concerns about the Spring equinox event organized by the new Chamber of Commerce director, Wagner Lavoie. After all, March weather is unpredictable. Still, there's plenty to enjoy, between flower-shaped candies at Salty Taffy's, spring rolls at the Rusty Anchor, and a parade of decorated bicycles. But the festivities soon take a stormy turn . . . Mac glimpses conflict between Wagner and other locals during the festival, but it's a shock when he's found dead in the Book Nook, pinned beneath a toppled bookshelf. It's an irresistible case for Mac's book group. She and the rest of the Cozy Capers will have to use all their sleuthing skills to bring the killer's story to an end . . .