I'm a bit confused..I need to know the best maths books for JEE preparation

I have ordered TMH maths and ML Khanna maths, but I need to know whether I can buy SL Loney and IA Maron?

If yes, why i need to buy them? are they useful?

The most common mistake that newcomers make is buying too many books. I’d suggest you focus on only one book, two if necessary, but not more that that.But whatever book you choose , do it thouroughly. Buying too many books is of no avial as you would never get time to read, theill just gather dust. I’d say ML Khanna is enough.