Chocolate Chip Cookie Murder by Joanna Fluke

This is a fun, easy book to read with lots of cookies eaten.  There are also cookie recipes included. 

Independent-minded Hannah Swenson makes her debut in a cleverly plotted cozy, full of appealing characters and delicious cookie recipes. In her hometown of Lake Eden, Minn., Hannah opens her own shop, the Cookie Jar, where much of the town's gossip percolates along with the strong coffee.

Early one morning, she finds the driver of a delivery truck shot dead in the alley behind her shop. Hannah's decides to help her brother-in-law, Bill, the county's deputy sheriff, to chase down the culprit.

Hannah is great at getting people to talk about things they would rather to keep to themselves. Motives ranging from blackmail to extortion abound. While delivering cookies, catering scouting events, and otherwise gadding about the community, Hannah gathers important clues.