Hello Suva
As you are in 11th class now so you need lots of study material and new question to solve .
So I would suggest you to solve dc Pandey first after that cengage because cengage contains some good and tricky problems.
You can solve IE erodove for advanced and subjective questions
And you should solve questions banks of any one good institute ( Bansal; Allen ; fitjee etc)
Because if you are limited to only one book for numerical then your ability to solve new and unseen numerical will be not so strong.
But you should read theory only from one book
So good luck

Hello dear....
Dc pandey is also effective for preparation for the Jee mains.If you are in now 11 th then you have a lot of time ,you may solve .If you are thinking about Jee Advanced then You should solve Cengage.

Hope it helps you .
Good luck.

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