... Maskerade by Terry Pratchett

I finished the first Discworld book I've read for years last night. Pratchet pumps them out at one or two a year and Maskerade was printed in 1995 so I'm way behind.

In any case, I really enjoyed the humorous look at opera in a fantasy world and will have to read the odd one or two discworld books a year since he varies the subject of them quite a lot.