There's a limited amount you can do in a thousand pages and I reckon the authors have done what they can.
This is *not* for casual reading, it's hard work on a par with Knuth's tomes. It's not as all-inclusive as the latter, but it goes deeper into certain aspects.
The mathematical bits at the start are okay, and there is an excellent exposition on the big-oh notation (and its relatives) - such is difficult to find, for some reason. That alone makes it worth getting.
However, as a work of art it seemed somewhat amorphous to me (yes, even books on mathematics and computer science, even technical manuals, are works of art and can be judged as such), and when I got to the end, I found myself not caring too much whether the butler did it or not.
That said, if you follow through with all the exercises and problems, and manage to do them all, you look like you could have a career as a code-cutter of adequate ability.
The world needs more books like this. Bring 'em on.