A book which start with basic and takes you to high level physics with proper understanding in every step every chapter.
Just start it from the first volume and soon you will master the concepts.
The book has both solved and unsolved exercices, start and high level questions and questions even with IIT level exercices.
The first volume definitely is 11th class physics and second one is 12th class but if one is preparing for IIT, NIT or other good level competition then both books needs to be mastered first as it also the first choice of all teachers.
Enough theory is provided before every chapter which builds the conceptual part.
While preparing for IIT I bought the books set a little late i.e after 12th in dropout which was difficult for me to cover but still I go through exercices as much possible and helped a lot, even it is helping now.
Readability is good and if you like physics you are going to like every chapter or every story.