Hey there

Cengage is a good book for jee mains and advanced cengage book is so made that you'll get questions from different books in it that is in cengage you'll find questions of hc Verma, ERODOV, etc all combined. Solving past year with cengage will give you good practice. But cengage alone is not enough try reading NCERT and for jee mains refer books like RD Sharma, pradeep etc so that you build your basic concepts as cengage is focused on jee advanced mostly.

Good luck