[marai2]

I totally agree. If you're into computers and computer-sciency interests and interpreters/compilers, try going through the Dragon book and try going through Bob's book. You'll realize that even though the Dragon book sells for something like $160, the Crafting Interpreters book is worth many times over for its pedagogy. (Of course both books have very different aims so it's not an apples-to-apples comparison, one is a good book for an overall Compilers course and the other gets you right in to writing your own interpreter with just enough theory to see how things fit together).