The mystery novel Twelve Angry Librarians features a keynote speaker dying at the lectern

I just finished reading the 2017 novel Twelve Angry Librarians by Miranda James (who really is Dean). This book is the eighth in his series of a dozen Cat in the Stacks mysteries. On page 82 Dr. Gavin Fong, the keynote speaker at the annual meeting of the Southern Academic Libraries Association, takes a drink from a poisoned bottle of water, collapses, and dies right at the lectern.

The problem for both Chief Deputy Kanesha Berry and Athena College interim library director (and amateur sleuth) Charlie Harris is that job-hopping Gavin previously made so many enemies that a dozen people have excellent motives for killing him. After another 177 pages we finally find out who done it.