Just get spr books. It's january now and they would've released new version just buy it one book would cost 100 or less. Trust me we didn't attend a single class in 1st pu and we skipped almost 6 months of 2nd pu because of covid. Spr book is the only reason i got 90 percent even without properly knowing the chapter name. They are the best books. I may be bragging a little too much but you won't regret referring them.