There is no study guide lol. But no, I know some people that used the Barrons one,
http://www.amazon.com/exec/obidos/tg...glance&s=books.
Its a compilation of all of your general classes. The Reading/Math sections are similar to PRAXIS I, not exactly, but close enough. If you've had Methods, you'll be ok. The History and Science sections, however are so random, its hard to study for it. All of us that just finished, we took it in different months, and each test was very differnet. Just know some basics about everything. They as REALLY off the wall questions.
Hope I didn't scare you. I didn't study and passed first try. Hope that helps some!!