The Club Dumas by Arturo Perez-Reverte

This book was made into a film called "The Ninth Gate" starring Johnny Depp. I liked the mystery of the film so I picked up the book. It had plenty of mystery but the plot was divided into two parts which seemed to be interconnected and I always expected them to be resolved in the end. But I found it a bit disappointing when it turned out that they had nothing to do with each other.

In that way, the movie was a bit more satisfying. But after all, I can really recommend the book.