Parallelism from within |?

Question

Books

Please recommend a book(s) that go into sufficient detail about:
- what is a thread
- what is a process
- how do these two differ from each other and why you can create multiple threads within a process
- how concurrency works and how SRAM can handle overlapping commands
- what part of the processor is duplicated when the number of cores increases: ALU, registers or something else
- how it all works at the hardware level

Answer 1

Modern operating systems
Have you seen this one?

Answer 2

It seems that a process is a memory area, and threads are sets of commands (among them there is always a main one).