Its too focused on the mathematical approach to parsing but almost no mathematical rigour or intuition for the actually interesting parts of compiler IIRC. The

Its too focused on the mathematical approach to parsing but almost no mathematical rigour or intuition for the actually interesting parts of compiler IIRC. These books really only help you for the first five minutes of each part of a compiler e.g. "Here's how to write a register allocator, go find the calling convention yourself and my office hours are never"