Don't like K&S.
The APA book (is it the orange one?), that is better but I still don't like either.
I'd forget about the PRITE. Study for the board exam, ignore the PRITE. The PRITE's questions aren't similar to the board exam other than that they're both on psychiatry. The style of questions are very different despite that they're from the same subject content.
If Dr. Jones teaches physiology, and you want to pass his course you get his old exams and study them. You don't get Dr. Smith's exams who teaches the same course in a different school. It helps but it's better to stick with Dr. Jones's stuff from the beginning.
The PRITE is highly over-rated, has poor questions, and everyone gets all worked up about it because they've come from a culture that measures your worth in a mulitple choice exam. All the PGYs feel it's like they're talking their SATs or USMLE. It's more like taking customer-satisfaction survey.