Man, in the 90's when I was learning about a lot of manufacturing processes, that tech book store was a gold mine!
I would get the pre-computer era books and those contained all the manual, analytical geometry means and methods. Awesome skill builders for the time.
I still use that stuff when making things sans a nice shop environment today.
My first internet account was at techbooks.com
ISP run on a Sun Sparc 10 and a few Linux boxes. I could dial in at 9600 baud, just smoking fast! Ahem.
It became teleport.com later.
Fun times.
In any case, Powells books is very highly recommended.