Hi!
    Master the NCERT biology Arihant volume-2 is a book which is Available both online and also as a hardcopy. This book helps you to understand the concepts really well and also gives a clear cut explanation for each and every topic. If you are preparing for your NEET  examinations, then you should definitely start with this. This book gives a solid approach to understanding the objective nature of NEET. You can also download the book online.