@ILikePlants DD got a 2300 first sitting w/ blue book and then she used the “Black Book” to understand why she got answers wrong. She said it really helped her. Her PSAT was good but no where near 230 (can’t remember what it was) and she said she felt this book combo helped her get her score. She did no other tutoring or prep. She has always been an avid reader of quality literature and that helped, too, she said for grammar rules and vocab. Good luck!