He's being modest :) Sure, the book doesn't cover many traditional compiler topics such as register allocation and code optimization. However, it does cover pa

He's being modest :) Sure, the book doesn't cover many traditional compiler topics such as register allocation and code optimization. However, it does cover parsing and translating to intermediate representation, which is 90% of what you need to get your own programming language off the ground. And to be honest, many university compiler courses won't have time to go much farther than that anyway.