It wasn‘t listed but the REAL book is Scallops and Sorcerers: Vampire Knitting Club: Cornwall by Nancy Warren, the second in the Cornwall spinoffs.
This was the perfect easy read, with some good faith clues and an easily solved (but still just challenging enough to be uncertain) murder.
I did read it super fast though, which is my only complaint with these. Knitting pictured is my Felix Cardigan (Berroco Mercado in Lupine)