The DevOps Handbook by by Gene Kim - This was my first book on DevOps. I didn’t understand most of what was in it the first time. Yet, I kept at it and it has helped me understand how to move assets to production.
Algorithms by Sedgewick and Wayne - A beautiful book that walks through basic algorithms in code. I come back to it because it always gives me inspiration on how to think.
The Design of Everyday Things by Don Norman - It’s more about Products and less about tech, but I still think of it with a tech focus. There many helpful lessons in the book, but the one I constantly use is to ask myself whenever I am using any product, “What makes this good and what could change to make it better”.