AP Language and Composition Study Help

This year, I’m taking AP Language and Composition at my local high school (sounds easy enough at first). Problem is, the usual teacher for the course is on maternity leave for a couple of months and the substitute has no idea what they’re doing (the assignments they’ve given are nonsensical and are generally time fillers). Any suggestions for prep books I can use to supplement the months of instruction I’m missing? If anyone has any tips at all I’d be thankful for them.

I suggest these books: http://bestapbooks.com/ap-books-by-subject/ap-english-language-and-composition/

I have used this website before and the books are very good.