I started reading Tim Powers as result of a name-mixup, but continued anyway.
I have never been completely disapointed by one of his books, but some are better than others, natch.
I've read The Anubis Gates , which was pretty good, and Dinner at Deviant's Palace which I don't remember at all, and The Stress of Her Regard which was okay. There were a couple of others, but Amazon does not list them and I can't recall their names. Something about time travel, I think ... I remember that I liked it at the time, though.
Edit: upon farther research, apparently it was The Stress ... that I liked very well - but did not involve time travel