I found a few of these Patchwork Mystery books at a local book sale. These are published by Guideposts and although they are a series, each one is written by a different author. In Squared Away, by Cara Putman, the main character, Sarah, is hunting for someone who has been spreading counterfeit money around. As she questions people who have recently attended a fabric swap, each of their stories unravel.
This is a delightful series for those who love cozy mysteries, especially if you enjoy those with a quilting theme.