The shelf
Four subjects, three books. Nothing here is sponsored, nothing is an affiliate link, and one row tells you to keep your money.
There are no affiliate links on this page and there never will be. Nobody pays me to name a book, I do not earn anything if you buy one, and I have not linked to a shop — search the title wherever you normally buy things. A recommendation someone earns a cut on is an advert wearing a recommendation’s clothes.
Ten years of real board questions in one place. Physics repeats itself far more than it feels like it does while you are panicking, and after thirty of these you stop meeting genuinely new questions — you start recognising which of about ten shapes you are looking at.
Same reason, and it matters more here. Organic especially is pattern-based: the conversions and named reactions come round again and again, and the only way to get fast at them is volume.
People do not buy books for English and then wonder why the writing section costs them marks. The formats — notice, letter, article, report — are fixed, and previous years show you exactly what a full-mark one looks like.
Do not buy a book for Maths. I did not, and it is the paper I scored highest in relative to effort — 71 out of 80, untouched by moderation. NCERT plus past papers is genuinely enough, and a reference book mostly gives you a way to feel busy without solving anything.
Do this instead
Both of these are free, official, and better than most of what you'd pay for. Work through them first and you may find you don't need the book at all — which is the outcome I'd rather you had.