Open Bocks

I known, "books".

Diseño en ingeniería mecánica de Shigley
Octava edición
Richard G. Budynas

Download
https://cnhv.co/1qfok

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.