Recently passed EE FE, buy a study guide for PE or just do practice exams?

I just passed the EE FE (spent probably 250 hours in the last 6 months studying with 2 of Wasims prep books and several practice exams). I figured just going off of NCEES practice exams and Zack Stones practice question books would be enough, but after scanning through, it looks like there is definitely some new material on the PE that wasn't on the FE. Should I buy a prep book (such as Wasims PE Prep book), or just hammer away at hundred of practice problems? I'm taking my test in a month, and I'm not interested in taking online classes, and I like the books. Also, I have virtually 0 experience in the EE field, so I can't rely on industry experience (I have an EE degree, so I'm much better equipped for an EE test, as far as knowledge of theory goes).