Gave away a copy to a developer in Brazil, and ordered the Kindle version, and need to order another print copy.

Can't recommend it highly enough --- I found it transformative --- read through it one chapter at a time, then re-worked the code of my current project:

https://github.com/WillAdams/gcodepreview

then went on to the next chapter --- about the halfway point I had the code cleaned up so well that the changes became quite minor.