I received this for Christmas from my in-laws years ago, and finally decided to have a look after rediscovering it when straightening out a corner of the back room. It's an impressively large volume with a sort of plastic plaque attached to the front cover that gives a nice 3D effect. It's also a rare example of a book that opens fan fold style, rather than having a binding along one edge. Not only can the book be unfolded into a long, continuous chart, but the pages themselves can be unfolded, making the chart even wider than the book itself. It looks most impressive spread out on the living room floor. My cats thought so too.
That said, I find myself wondering just who this is for. In addition to the chart itself, there's text on the back giving capsule biographies of all of the characters depicted on it. There's also a bit of an overview of the history of the Marvel Universe. But it's certainly not comprehensive. I’d say that anyone who's been a Marvel fan for at least a few years could rattle off at least a dozen characters not on the chart. And the hardcore fans already know much more about the history and the characters than any book could hope to contain.
The chart is also poorly organized. Each character is marked with a letter/number combo so that their biographical data can be looked up. But the numbering scheme doesn’t appear to follow any logical sequence. I had a difficult time finding some people, because apparently having “A10” somewhere next to “A11” never occurred to the makers of the chart.
About the only comics fans I can see buying this are the ones who have to have *everything*. It looks pretty, but is unlikely to teach the serious fan anything they didn't already know. I suspect that a fair portion of sales of this book were purchased as gifts by non-fans and given to the fans in their lives. It's very much a gift book.
While I can't recommend it for its content, it's certainly an impressive object. And, goodness knows, there aren't many fanfold books floating around out there. Recommended as a curiosity, at least!