Dear Gautam, there are quite a few books for IIT JAM Mathematics. But the popular ones among the students are:

• Integral Calculus:F. Ayres (Schaums), Gorakh Prasad
• Vector Calculus:Murray R. Spiegel (Schaums), A.R.Vasishtha
• Linear Algebra:Seymour Lipschitz (Schaums), H. Anton, A.R.Vasishtha.
• Ordinary Differential Equation:Peter J. Collins, G.F. Simmons, M.D. Raisinghania.
• Principle of Real Analysis:S. C. Malik.
• Real Analysis:H. L. Royden.
• Modern Algebra:A. R. Vasishtha 8. University Algebra: N. S. Gopalakrishan

Hello Gautam

Science schedule incorporates following themes and here are the point astute IIT JAM Mathematics Books people may allude to break IIT JAM 2020.

Indispensable Calculus: F. Ayres (Schaum's), Gorakh Prasad

Vector Calculus: Murray R. Spiegel (Schaum's), A.R.Vasishtha

Direct Algebra: Seymour Lipschitz (Schaum's), H. Anton, A.R.Vasishtha.

Normal Differential Equation: Peter J. Collins, G.F. Simmons, M.D. Raisinghania.

Guideline of Real Analysis: S. C. Malik.

Genuine Analysis: H. L. Royden.

Present day Algebra: A. R. Vasishtha 8. College Algebra: N. S. Gopalakrishan.

Hope this will be useful for your preparation.

All the best