A truly excellent end to a great series of firsts.
Most (though not all) of the first appearances of various characters in various titles. I never understood the exact criteria for appearing as some of my favourites such as Linda Carter didn't appear in the 60s book and yet the Human Torch appears in the FF1 and Strange Tales 101. This volume (part 3) includes Nova, Ms Marvel, She Hulk, Black Goliath, etc - some of the comics I remember well and others are fairly obscure. The reprint quality is superb throughout. An added bonus was the inclusion of all (and I assume it was all) of the covers of the ones that didn't make it into the volume (such as reprint issues, licensing reasons, etc) Some of the titles I have never seen in any comic shop or comic convention.
Would have been even more extra special if the book had included a few more extras such as covers of titles never released (surely there must have been a few of those or titles with different titles on release etc) as well as perhaps a few historical essays as well as some biographies / comments by and about the key writers, inkers, artists, letterers etc of the period.
Would love to see a 50s as well as 80s version of the series.. probably hard to imagine that happening as I am certain the former would be tricky and the latter would be 10 volume series of increasing complexity of characters as there were so many new super heroes introduced during the 80s. Another possible would be (like the origin series years and years ago), a villain series for the 60s and 70s .. but then who would be in the book ? Paste Pot Pete, Dr Doom, Melter, Jack Frost, The Looter etc - perhaps one off villains would not be mentioned but even so, the book would still cover quite a few volumes.