Can you help me get some books on the following topics?

I’m interested in getting good books on the following topics:

Alchemy (ie, the history of it, what it is, how it started, etc)

Some kind of machinery handbook that tells you how to work general things, like cars or computers. I heard there are books like that. Some general handbook that covers how electronics/machines work. If there’s not much like that, I’d especially love a book that tells all about car parts and such.

There was this hardcover book I believe that I stumbled upon in Barnes and Nobles, and I really liked it but I was young and had no money and already got something and was ready to leave. It was about the Middle Ages/Medieval times and how most of what we think of that age is full of misconceptions. Something like “Were the Dark Ages really dark?” Something like that.

Is there a book out there on the Library of Alexandria? Or at least that covers a great deal of it?

Also, as a sidenote, not that important, but if you know any “history
books off the top of your head that should be avoided because they’re outdated or biased or flimsy or whatever else, by all means mention them. I just like to gather a library of knowledge.