Dear aspirant !

Hope you are doing well ! It depends on your exam.  You should mention exam name as well as application name on which you want to see books . Like if you are preparing for neet ,some app is there ,for jee the app is other .for upsc there is different app . So for every exam there is different - different types of app where you can find the books for them to prepare yourself for the examination. Kindly clearly mention all the things properly.

Hope it helps you !!

Thanking you !!