The Prague Cemetery by Umberto Eco

This book has an extremely unpleasant main character with a split personality. When the book opens he's trying to determine his identity, which he can barely remember, and whose stability is compromised by garments and accoutrements that seem to belong to two lives rather than one. As the book goes on, the main character, Simonini, his alter ego, the Abbé Della Piccola, and the narrator work together to reconstruct Simonini's activities. Despite the main character's reprehensible views, the book is fascinating, as it ties together a wide range of nineteenth century conspiracy theories (from the Paris Commune to the Dreyfus Affair). It also reflects on the nature of forgery and on the difference between fabula and syuzhet--the latter in an afterword that traces the structure of the plot. Despite the complexities of the plot and theme, this book was easy to slip into and enjoyable to read.