Great list. I picked up "Introduction to Algorithms" by Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest, Clifford Stein for the first time in 20 years since undergrad. Still a useful! The classics never die. I get a kick when I see "The Art of Electronics" and "The C Programming Language" still being recommended on the regular. Nice to see that my undergraduate education from 20+ years ago is still relevant! I think this also helps to underscore the idea that tech fads come and go, but the fundamentals never die.