The Secret of Annexe 3 (Inspector Morse, #7)

Much too early on New Year's Day, a grumpy Inspector Morse is summoned to investigate a murder at the Haworth Hotel. The victim is still wearing the Rastafarian costume that won him first prize at the hotel's New Year's Eve party; his female companion and the other guests in the annexe have vanished. It's a mystery that's a stretch even for Morse. But with pit-bull fervor he grabs the truth by the throat and shakes loose the bizarre secrets of a cold-blooded crime of passion. . . .