AP Environmental Science preparation

<p>Hi,
I'm using Barron's review book to prepare for the APES exam. I'm finding that it's very detailed, perhaps too much so to be a reliable tool for reviewing. The writing is very convoluted in places, the free-response questions seem overly difficult, and I've come across an unsettling amount of spelling errors. I was wondering if anybody else was having the same experience, and if there is a better book that I can use to prepare with (perhaps Princeton's), or if I'm simply complaining too much. Thanks!</p>