I read everything by Tim Powers. Medusa’s Web, his latest, is good for fans. It has all the good ol’ Tim Powers features: strange and alien orders of being, a thread made out of the unexplained quirks of history, addiction, family love. At the same time, it would not be the first Powers book I would recommend. The ending with the sister is thematically off, and for whatever reason, his books are not at their best when he draws too deep on the California well.
I would recommend the Anubis Gates and Declare. Perhaps also Last Call. But above all, the Anubis Gates.