It’s is very good book for nerds only because it has very great question which can be solved by many students and can frustrate many students that’s why firstly u have to complete ur selected books by ur state board or cbse because they have questions that are solvable by almost every kind of student which is nessary to pass the exam other than that of u try to study at end time of ur boards u may end up with messed up topics so its worthy buy when u give a plenty of time to maths otherwise u finally end with messed up topics??