I've been diving head-first into raw, nerdy, mathy concurrency theory. Something fun about being into niche subjects in computer science is that the textbooks

I've been diving head-first into raw, nerdy, mathy concurrency theory. Something fun about being into niche subjects in computer science is that the textbooks for them have very low resale value. As a result, you can make "best offers" on eBay for 1/2 or even less than the suggested price, and it will likely be accepted since the seller really just wants to get rid of them. I've been taking advantage of this and purchased a bunch of obscure concurrency theory books that I've been reading through.