Just One Author Books: For Students who wants to follow just one author book to cover all their needs I would recommend following books

Maths: G Tewani Cengage Publications

Physics: DC Pandey (set of 5 books)

Chemistry: KS Verma Cengage Publications

Reference/Theory/Questions Separate Books:

Maths (Reference): None

Maths (Theory): NCERT

Maths (Questions): G Tewani Books and Comprehensive Mathematics By Tata McGraw Hill

Physics (Reference): Resnick, Halliday and Walker

Physics (Theory): HC Verma Volume-1 and Volume-2

Physics (Questions): DC Pandey (all 5 books) and BM Sharma Cengage Publication

Chemistry (Reference):

Physical: None

Inorganic: JD Lee

Organic: LG Wade

Chemistry (Theory): NCERT

Chemistry (Questions):

Physical: KS Verma

Inorganic: OP Tondon, KS Verma

Organic: KS Verma, RK Gupta

Must Have Complementary Books:

14 years Solved papers (2003–2016) or a newer version from Arihant Publications

38 years topicwise chapterwise solved papers (Maths: Amit M Agarwal, Physics: DC Pandey, Chemistry: Ranjeet Shahi)

Hi Tejinder,

For JEE mains, I would suggest you to only solve complete HC Verma and you NCERT. Apart from these, you can go for DC Pandey's Thermodynamics.

For JEE Advanced, apart from HC Verma, you need to solve the following books-

I.E. Irodov (Bible for JEE Advanced)

Halliday, Resnick and Walker

and, Arihant Publications

Also, you can purchase the previous 40 year solved jee mains and advanced papers from Amazon by referring to the given link-

https://www.amazon.in/Chapterwise-Topicwise-Solved-2018-1979-Physics/dp/9313163292/ref=pd_bxgy_14_img_3/258-8256907-8785537?_encoding=UTF8&pd_rd_i=9313163292&pd_rd_r=564172ed-8066-11e9-9ff2-d5fd6dee570d&pd_rd_w=jF0QQ&pd_rd_wg=kM7DV&pf_rd_p=92c5dc59-6da4-488e-ba00-262537223f6b&pf_rd_r=SX5XAYXNR1E544Q5Y2J6&psc=1&refRID=SX5XAYXNR1E544Q5Y2J6

All the best!!!