The "I wish I had read that first" textbook list

Question

Here, I am trying to collect as many "I wish I had read that textbook first" textbook names as possible, for as many different topics in mathematics as possible.

The "I wish I had read that textbook first" criterion is when you've already mastered some topic and in retrospect, you can see that "Textook X written by Y" is the best starting point in learning that topic, and most of your peers agree.

Answer 1

I surely wish I has read Katsumi Nomizu' Fundamentals of Linear Algebra before any other textbook written about that subject.

Answer 2

For Gaussian processes, without a doubt the first text should be Gaussian Processes for Machine Learning by Rasmussen and Williams.

Answer 3

I wish I had The Joy of Sets by Keith Devlin when l started learning set theory

I also wish I bought Croom’s Princples of Topology It is an excellent book.