The Touch of Your Shadow, the Whisper of Your Name (Babylon 5, Book 5)

A sci-fi mystery in outer space, an outbreak of madness among alien races abroad Babylon 5, chief B5 crew having their hands full and a myriad of amusing situations scattered all the way across. Sounds like a good episode of B5, and that's this novel. Being the fifth book, I think books 4 and 5 continue the enjoyable expansion to the B5 story as novels, and have been better reads than the first three books.