Hi GemmaMichelle
The standard Pratt series of books were perfect for me. I needed no confuser/simplifier - just read and re-read the books and used the QA sections at the back as an indication as to my understanding.
I found that doing some simple dual nav's helped the nav no end and get your instructor talking about met whilst up there so you can relate the theory to real world situations. This is one I struggled with the most!
Comms written also is easier once doing nav work (especially if there's a Class D near you or a MATZ to work through).
Performance and Gen tech for me I did the week before my actual flight test
