When it comes to Marvel comics, I'm a real sucker for the cosmic stuff. So much imagination on display and with the storylines Starlin and company bringing to the medium through this collection, its a real treat to read.
While this omnibus is marketed as the comic origins of the character Thanos, it is more accurate to say it is about Thanos, Captain Marvel (the second one... Not the one who would be later known as Shazam in DC, or the female version that's become more well known in recent history), and Adam Warlock. For the latter two, when their stories intersect with the Mad Titan is when they are at their best. All in all, the way the issues are collected and a tapestry is woven over time is well done. A few times I wondered, "we seem to be off on a tangent over here..." and then B A M! It starts clicking together.
Having known little about Adam Warlock and even less about this Captain Marvel when I began, it was interesting to see these two main opponents of Thanos develop into very different but equally interesting beings. Marvel, trapped between dimensions and given the choice to decide whether he'll be the Kree warrior or something more for the sake of the universe. Captain Marvel's story by the end of this omnibus - wow, powerfully emotional.
And Adam, a more tragic figure who constantly struggles with what the universe seems to be forcing him to become, burdened by the cost to his friends and the stars around him as he strives to find peace and purpose in spite of it all.
Thanos' appearances are always accompanied by something heavy going down, and this edition certainly gave me an appreciation of his character pre-Infinity Gauntlet event. There is also some insights to the cosmic forces' games of life vs death. Really fun stuff.
If I were to complain over anything, I would say the cover art (DJ is fine...I'm talking about the actual covers) on the book is a bit lazy and ill-fitting empty starfield with the Infinity Gems. This book has almost nothing to do with the Infinity Gems
Additionally, none of Thanos' comedic appearances are included here - I looked and looked, but the THANOS Helicopter is not here, neither is his defeat at the hands of Squirrel Girl. There are a wack of extras at the end of the book that are interesting though. Some interviews, fanzine articles on the characters, unused sketches, marvel encyclopedia pages of the time for the characters - that kind of thing.
Overall, highly recommended if you like cosmic elements in comics, science fiction stories, or are interested in some of the classic stories of 70s/80s comics. This would also be very helpful reading if you were interested in the Infinity Gauntlet event. These three characters do not disappoint.