Allen cbse booklet of PCM for boards preparation.
If you are a jee aspirant and also want to score above 75% in boards then this book is all you need.
it covered summary and concepts of every chapter
it contains the illustrations and how to solve step by step in boards.

covers all type of imp questions from ncert which is asked in boards.

contains PYQs of CBSE.

have 2-3 excercises after each chapter