Mostly just use soulseek and archive. You reminded or aaaarg dot fail and monoskop. But that seems to be down now:( I would also check out your local library who often have access to all sorts of eBooks! This seems like an interesting article tho. https://networkcultures.org/blog/2024/09/22/henry-warwick-the-slow-cancellation-of-online-libraries/ Might interest the #alexandria people too