The "Real Book" is a collection of standard songs that Jazz musicians are expected to know. Project Euler serves a similar role by creating a set of puzzles that help programmers test their abilities and become comfortable with new programming languages. And there are bibles of programming like The Art of Computer Programming. While these are certainly a start, it would be interesting to expand these resources beyond algorithms to practical, albeit more mundane, tasks like setting up a firewall.
The "Real Book" for hackers would include techniques for things like writing algorithms and web scrapers, version control, and server configurations. And instead of only being a collections of challenges, some of the entries would focus on best practices accompanied with a rationale. While constantly changing, having a compiled resource that codifies a basic hacker toolbox would be extremely valuable.