The "museum-in-a-book" part of the title really is spot on. To simply call this a "book" is not doing this wonderful creation justice. This is so much more than just a book covering the story of Marvel Comics, it's more like a guided tour, with two guides (the authors) that in addition to really love and know the subject also have a wonderful sense of humor and while being accurate and detailed they are not taking the subject too dead serious. You got quite a few good laughs waiting for you between these covers!
You'll explore postcards, sketches, notes, covers, advertisements and all sorts of tidbits and gems neatly stored in plastic pockets (yes - not just copied onto regular pages of a book. This IS a museum!) and knitted into this historic travel through time.
So, if you too are a Marvel fan, do yourself a favor and get this ticket to an entertaining exploration. You will revisit this museum over and over again!