[Tomte]

Old books aren't bad, in fact, it's rare that new books are much better than the very best of the old books.

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.

[Ivanov]

I am not really complaining about Discrete Math. The book listed in Intermediate is fairly/horrendously difficult for someone who hasn't seen elementary treatment of the subject before.

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.