Crewel World Needlecraft Mysteries #1 by Monica Ferris

Margot loved to knit and was expert in the craft. She also enjoyed teaching others how to knit and plan their projects. Her shop specialized in needlework classes and supplies. When her sister Betsy needed a place to 'collect herself,' Margot welcomed her with open arms and included Betsy in the daily routine and life at the shop. Not long after her arrival, Betsy, was shocked and depressed when Margot was found dead and the shop had been vandalized. Would Betsy keep the shop open? Would the landlord make her move? Uppermost in Betsy's mind and heart was finding Margot's killer. But that detective seemed to have decided exactly what kind of person killed the shop owner and he wouldn't look at anyone else. Betsy discovered how much people liked Margot and how much they wanted to help Betsy. Even to find the killer.