The Pawful Truth by Miranda James

Charlie Harris has decided to take a class on early medieval history.  He's only going to audit it. He's a bit uncomfortable with students half his age, but he meets another older student so it'not so bad.  He hears the teacher talk to her after class, asking her what the hell she's doing in his class.  Then she asks Charlie to be her study partner.  He declines since he is not a student.

Shortly after that he learns that she has been murdered...

Berkley and Net Galley allowed me to read this book for review (thank you).  It will be published July16th.

When he tells the detective what he heard the teacher say, the teacher becomes a suspect.  As he picks up on the college gossip, it appears the teacher was having affairs.  More discussion leads to a suggestion that his wife, another teacher, might be doing the same.  Her husband sure hates having a French Canadian around her.  He's made public scenes with him twice.  Then he ends up dead.

Did the wife kill him or did one of the two men she was seeing to get info for her next book?

The cops are working hard to get an answer, but Charlie finds it first.  And he is suddenly attacked by the killer and almost dies.  I like who saved him and I bet you will, too.