September book club: On What Grounds

From Goodreads:

Introducing a delightful new series featuring Clare Cosi, manager of the historic Village Blend coffeehouse...

Clare arrives at work to discover the assistant manager dead in the back of the store, coffee grounds strewn everywhere. Two detectives investigate. But when they find no sign of forced entry or foul play, they deem it an accident. Still, Clare is not convinced. And after the police leave, Clare can't help wondering...If this was an act of murder, is she in danger?