PMI
1. PMBOK PDF file 2000 version
The PMBOK or the principal material you need to chew on comes with two flavors: hard-copy or electronic verion which is a pdf file.
It divides project management cycle as well as seven knowledge area.
There are two versions of PMBOK, 1996 & 2000. The 2000 version is the newest.
2. Two exam books with two to three full examples.
That's what I did to pass. I didn't attend any class. PMI online bookstore offers not many books with simulation tests.
3. Does it make sense to take classes?
These books are not enough to pass?
PMBOK itself mightn't be enough unless you're lucky. It has some distance from real test.
For 35-hour, there is no need to take any class to fulfill. Your career training would be sufficient.
In NYC, there is a company called "knowledge mover" which offers PMI exam class. They claim 160-average score. It's better to let your company pay for it.