Cat and librarian hero, my catnip

Murder Past Due  - Miranda James

Charlie Harris works in his home town, Athena, Mississippi, as a librarian who walks his cat to work, a rescued Maine Coon, on a leash.

An ex-classmate of his, Godfrey Priest, is returning to the town to do a book launch and has some other plans as well, this involves Charlie's lodger, the son of another ex-classmate. When Godfrey ends up dead things are complicated and messy and Charlie can see some things that need to be investigaed to discover what has happened and a lot of skeletons come out of several closets.

I enjoyed it and I'm looking forward to more.