What a great book. Something like this is long overdue. If you've done a lot of reading of comics history books and articles in fanzines, you're not going to learn much of anything new, because the biographical synopses are pretty basic. They don't exactly dig too deep. But it's a nice primer, with the list of "heroes" well-chosen. You could almost have edited the text down here slightly and published this as a set of trading cards, but it's really much nicer to appreciate the portraits here with the detail revealed by the generous page size. Text-wise, the introduction by Drew is far more revealing about himself. You might infer from some of his satirical comics work that he's something of a wise-guy, but here he comes off as very much the "fanboy", very human and relatable.
The main thing here are the portraits of Drew's comic art heroes, which I found to be very respectful of their subjects (as a caricaturist, Friedman's drawings can sometimes be barbed and pointedly unflattering -- that's certainly not the case here). Looking down the contents page, this certainly seems to be a who's who list of those who've contributed iconic and landmark works in American comics (mostly comic books, but this isn't limited to those), with perhaps just a few less-obvious choices. Everyone profiled here made their mark upon the medium in the 1930s through 1950s (or like Otto Messmer, even earlier)... and just for contrast, one "Villain of the Comics" is included (Dr. Fredrick Wertham), along with a few important non-creative types like Martin Goodman. Much less familiar than the names will be the faces, even for those who've read prodigiously their comics histories and fanzine interviews. Probably at least half of these were first-time experiences of seeing the faces behind the names for me, some of them not what you'd have pictured at all, others looking like the very ordinary, untalented sorts of people you'd see everywhere you go in life. Very few are portraits of the artists as they were at their height of popularity, productivity and impact on the field -- most of these capture the artists in late middle age or their senior years. Which is just fine, because you can see some of that life experience etched on their faces.
You probably already know just from the description of the contents whether or not this sort of thing is up your alley or not, so if it is, just buy it. You won't be disappointed. It should go without saying that if you are (or are hoping to be) a comic artist working in this field who has any modicum of respect for the history of your chosen medium, that this is an absolute no-brainer, a must-have for your bookshelf.