This is a very thick book packed with facts, figures, dates and history. It is unfortunately mind numbingly boring. If you use it as a reference book to look up the potted history of a character or occasionally browse some of the more in-depth articles on the history of comics it is fine. Five minute chunks here and there are ok. If you try and read more the giant slabs of text and monotone commentary proves unpalatable.
For a book dealing with visual media there are no helpful timelines or other snazzy graphics to make the facts more digestible. There are a lot of comic covers however and pre-internet this would have been a great chance to see rare art you never would.
The chapters start with male heroes at 193 pages and get progressively shorter as they go through female heroes, teams, newspaper heroes, war heroes, western heroes and sci-fi heroes. There is also a 30 page introduction that takes you through the history of comics.
Good for research but dull as ditchwater.