Chicago undergraduate mathematics bibliography
ocf.berkeley.edu
ocf.berkeley.edu
> The worst calculus book ever written. This was the 150s text in 1994–95; it tries to give a Spivak-style rigorous presentation in colorful mainstream-calculus-book format and reading level. Horrible. Take a look at it to see how badly written a mathematics book can be.
Pretty scathing review.
The Reddit discussion linked in another comment yields an updated Github repository, but a cursory glance didn't come up with any big changes.
Re: your Discrete Math complaint; if the author (and his friends, there were very few reviewers involved) didn't specialize in Discrete Math, then it's not surprising that somethign is missing. In fact the author actually explicitly says that the list is incomplete and which his specialties were.
Also, there are newer books of comparable quality to old classics like Algebra by Birkhoff/Maclane. If nothing, they have updated prose. Chapter 0 by Aluffi is phenomenal, for example.