Hardware books recommended by reddit

The most-mentioned books on r/hardware.

Computer Architecture
18 users
Computer Organization and Design
8 users
Code
8 users
Upgrading and Repairing PCs
5 users
CompTIA A+ certification exam guide
3 users
Digital Design and Computer Architecture
3 users
Computer
3 users
The Elements of Computing Systems
3 users

Looking for more? Similar subreddits are artificial, FPGA, PLC, rocketry, and slatestarcodex.