@roter 5d
Thanks for this resource. It also serves as a LaTeX math example --- the source for the book is provided.
@rgrmrts 5d
I remember using Mathematical Thinking [0] for Concepts of Mathematics (21-128) which is also a great book!

[0] https://www.goodreads.com/book/show/445059.Mathematical_Thin...

@rickstanley 5d
Does this replace the OP? Or is "An Infinite Descent into Pure Mathematics" a complementary book?
@Prickle 4d
Thankyou for the updated link!
@Mochsner 4d