Reilly,the interim head of the Athena College Library, has upset most of the staff, and to top it all wants to ban Diesel from the library and sacrifice the rare books and archive dept to budget cuts, thus putting Charlie out of a job. So nobody is that upset to hear he has been murdered. Since initially Melba is a suspect, Charlie gets involved with the investigation.
Despite some twists and turns, the murderer was fairly obvious early on.