At the college (and university), on each topic, there are simply too many good books to choose from. It is easy to get overwhelmed.
Then there are the tests. For semester exams, there are simply no substitute for class notes. But what about the entrance tests like GRE Math Subject Test or TIFR, M.Math and IIT JAM? What books will be most efficient for the preparation for these tests?
There is also a conflict between beauty and efficiency. Our heart desires to read beautiful expositions, but our mind seeks technical sophistication.
This book list can be regarded as the First Layer or Common Minimum Requirement. They provide both beautiful exposition and efficient problem solving skills. They are ‘easier’ than some of the cult classics.
It is important to completely solve atleast one book per topic before going into the harder ones. You do not need to solve hard books for all topics. It is mostly likely that you will doing research in a particular subtopic in future. Hence it is intelligent to choose a harder book in one subject of your liking in the second round while gaining moderate vocabulary and idea on broad set of subjects in the first layer.
With the above points in consideration, here goes the book list:
Chapter 0 of Serge Lang’s Introduction Linear Algebra
Introduction to Linear Algebra by Gilbert Strang
Contemporary Abstract Algebra by Gallian
SAGE Math (computation software)
Introduction to Real Analysis by Bartle Sherbet
Problems in Real Analysis by Kaczor
Topology of Metric Spaces by Kumaresan
Vector Calculus and Differential Equation
Calculus, Early Transcendentals by James Stewart
Math 18.02C course in MIT OCW (contains notes and problem sets)
(also for Vector Calculus, use notes from mathinsights.org and software like Geogebra)
Test of Mathematics in 10+2 Level (to keep high school topics familiar; especially skills in elementary number theory and high school calculus are inportant for Tests like GRE Math Subject Test and M.Math objective test)
Cult classics that we deliberately omitted from this list includes Rudin, Herstein, Artin, Hoffman Kunz, Munkres etc. We also omitted modern jewels like Christenson, Tao, Dummit Foote.
The bottom line is: make sure you completely work on at least one book per topic before hunting for another book on the same topic. No book will have everything that you seek.