Hello.
.
No, there are more good authors then ML.khanna for jee mains or advance preparation.
.
But it even varies from subject to subject and topic to topic like,

For physics,
HC Verma for vol 1&2
Walker for fundamentals of physics
DC panday for understanding physics
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For chemistry,
R.C mukherjee for modern approach
Tandon for organic chemistry
.
For math's,
RD Sharma for objective maths
S.L loney for trigonomentry

And Many topics by different authors are suggested for best preparation.
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Here is the link which provides you which topic you should learn by different authors accordingly.

https://engineering.careers360.com/articles/best-books-for-jee-main

And inversely for JEE advance follow the below provided link.Mostly you will cover maximum portion if you follow the link provided for JEE MAINS

https://engineering.careers360.com/articles/jee-advanced-preparation-tips-physics-chemistry-and-mathematics

This will guide you to complete full portion and makes you ready for examination.
Best of luck

Yes it's a great book to rely on. It has good number of problems covered right from basics to higher level. It's a good book to score good marks in JEE MAINS. it will really  help you. Make sure you complete the book and practice problems daily. At the same time, solve previous years question papers, even they'll contribute a lot in your success story. Best wishes. Thank-you.

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