"N" Is For Noose by Sue Grafton

Kinsey, headed home from Carson City, Nevada, stops at Nota Lake, California to interview Tom Newquist's widow, Selma. Selma feels Tom, a detective in the sheriff's office, had a lot on his mind before he died suddenly and she just wants peace of mind. Kinsey agrees to look into things but doesn't feel she will find out much. Well, look out, 'cause things start happening when the citizens of this small town find out she is doing some investigating. Again, Sue Grafton has another great "who dun it?"