Ask HN: You can only recommend 1 Tech book – name it

Designing Data Intensive Applications by Martin Kleppman

Programming on Purpose - Essays on Software Design, by P.J Plauger

Practical Common Lisp - Peter Seibel

[1] http://www.gigamonkeys.com/book/

The Art of Computer Programming - by Donald Knuth

Refactoring by Martin Fowler.