Share your books on the matter of engineering, anything that reasonably falls under the general group description. Again very much a work in progress/will never be complete.
Can be reference book, can be more of a learning book, can be rare/expensive or can be common, can be old or can be new.
Do note that books are still copyrighted works so no sharing full copies unless they have since drifted into the public domain.
http://www.vintagemachinery.org and http://www.lathes.co.uk/ have some very interesting materials here, as might archive.org but that gets more tricky.
Machining.
Machinery's Handbook
This series, starting in the early 1900s and going to today, is the de facto standard for machining for most American and thus world of machining.
https://books.industrialpress.com/machinery-handbook/
ASM metals handbooks
If you wanted to know things about metal then this is the series for you, there is a more general book as well.
https://dl.asminternational.org/handbooks
How to run a lathe
Now quite old but if you wanted to know how to run a lathe then it is still probably going to be suggested.
http://www.vintagemachinery.org/pubs/1617/3789.pdf
The Art of Electronics
Generally considered the bible of electronics design, more recently did see a new edition for the first time in many years.
https://artofelectronics.net/
Can be reference book, can be more of a learning book, can be rare/expensive or can be common, can be old or can be new.
Do note that books are still copyrighted works so no sharing full copies unless they have since drifted into the public domain.
http://www.vintagemachinery.org and http://www.lathes.co.uk/ have some very interesting materials here, as might archive.org but that gets more tricky.
Machining.
Machinery's Handbook
This series, starting in the early 1900s and going to today, is the de facto standard for machining for most American and thus world of machining.
https://books.industrialpress.com/machinery-handbook/
ASM metals handbooks
If you wanted to know things about metal then this is the series for you, there is a more general book as well.
https://dl.asminternational.org/handbooks
How to run a lathe
Now quite old but if you wanted to know how to run a lathe then it is still probably going to be suggested.
http://www.vintagemachinery.org/pubs/1617/3789.pdf
The Art of Electronics
Generally considered the bible of electronics design, more recently did see a new edition for the first time in many years.
https://artofelectronics.net/
