I'm looking for a reference -- of any kind, website or book -- for practicing integration techniques. The only book I have on hand is Stewart's calculus book, but that's not quite what I'm looking for.
I need something with a lot of different types of problems; problems on the challenging side -- in the sense that they involve some clever use of a common technique, or use of a lesser known technique, for example. With that said, I'll most definitely need an accompanying solutions manual.
I have some exposure in analysis at the level of baby Rudin, so more advanced references are welcome as well.
Note: I did do a search and found this post (Zwillinger), but didn't find much else.