Hi! I'm the author. Also a big fan of Cryptopals; I was one of the reviewers for Set 8, and working with some of the authors. It's interesting to hear that point of view; because I thought C101 took the same approach as Cryptopals in the sense that it focused on teaching crypto by breaking it. When I say "learn by doing", I'm referring to stuff like walking through a bit-flipping attack just like cryptopals does. I recommend (and have organized/will be organizing) study groups where we work through cryptopals using Crypto 101; and I think that's a great idea. I was originally going to add exercises for C101, but honestly, Cryptopals was already that, and there wasn't much point in reinventing the wheel. I guess I should probably link to them?
I think it would be good to link them, I started reading, got to page 30 and thought it would be nice to try the challenge. This reminds me when I thought I could handle myself in Linux, but when I played OverTheWire wargames, I still learned a ton of things that you only learn by doing.
I had a similar POV as well -- I went into reading this book thinking there would be exercises and projects to reinforce the ideas. In particular, the following sentence (and remaining paragraph) in Chapter 1 set me up for that:
> The exercises accompanying this book focus on teaching cryptography by breaking inferior systems.
