Library
Books I have read, am reading, or keep coming back to. Not all of them are recommendations.
Reading

The Elements of Computing Systems
Noam Nisan, Shimon Schocken
Building a computer from NAND gates up to an operating system. The book behind nand2tetris.

Code: The Hidden Language of Computer Hardware and Software
Charles Petzold
How computers work, from flashlights and telegraph relays to a working CPU.
Read

The Kybalion
Three Initiates
A 1908 summary of Hermetic philosophy as seven principles, starting with "the All is Mind".