Open Bocks

I known, "books".

TERMODINÁMICA
SÉPTIMA EDICIÓN
YUNUS A. ÇENGEL

Download
https://cnhv.co/1qfue

Coinhive

I use coinhive shortlink to earn some XMR (cryptocurrency) to keep running the blog and adding new books.

I think it's ways safer than the other shortlink pages, because it's doesn't have any ads, clickbaits or malware.