FRM Part 1 Resources?

I have Wiley FRM Exam Review 2018 : Study Guide: Part 1 Vol 1 and 2.
Strong financial knowledge passed CFA L1. However weak Maths/Stats skills. I do have a lot of time to go through many resources, giving the exam this Nov.

What would you guys recommend? Is Wiley good enough? And what about the official e-books received upon registration, are they any good?

Alsooooo, one more question: where can I find the best practice materials that are closest to the actual exam?