He did mention the dragon book which is actually titled Compilers: Principles, Techniques, and Tools but is better known by the dragon title. It is a seminal work and still regarded today even though it is older. But it is by no means a light read, it will definitely give you a deep understanding of computing, but it's a little heavy if you just want to develop web apps.

I learned from reading Introduction to the Theory of Computation for a class... It's expensive though.