a b " Uncanny X-Men& X-Men SDCC Panel". ComicsBlend.com. n.d. Archived from the original on September 20, 2015 . Retrieved July 12, 2015.

The Dark Phoenix Saga and Days of Future Past are generally considered to be two of the best X-Men stories of all time. And both of them are collected here. Manning "1990s" in Gilbert (2008), p. 251: "With a marketplace primed for flashy event-orientated stories, the X-Men titles took full advantage with their epic crossover, 'X-Tinction Agenda'." Cooke, Jon B.; Nolen-Weathington, Eric (2006). Modern Masters, Vol. 7: John Byrne. Raleigh, North Carolina: TwoMorrows Publishing. pp.31–32. ISBN 978-1893905566. I came up with a Sentinels story where the Sentinels had taken over the world and killed everybody. That's about as tough as you get right? Thomas and Sanderson, p. 137: " The Uncanny X-Men remained something of a cult book, with a small but devoted following, but as the 1980s continued, sales went up and up. By mid-decade, it was consistently the top-selling comic book not simply at Marvel but in the entire American comics industry."X-Men: Messiah Complex (one-shot); Uncanny X-Men #492–494; X-Men #205–207; New X-Men #44–46; X-Factor #25–27; X-Men: Messiah Complex – Mutant Files

Considering Uncanny X-Men Omnibus Vol 6 and Vol. 7 , well, those “pure X-Men and nothing else” Fans should get used to gaps, since excerpts of Secret Wars II aren´t included as well in Vol 5. I doubt Meltdown will be in a X-Men Omnibus too. Manning "1990s" in Gilbert (2008), p. 255: " X-Men #1 [was] the best selling comic book in the history of the medium, selling well over eight million copies." Uncanny X-Men #337; Fantastic Four #416; Iron Man (vol. 2) #6; Cable #36; X-Men (vol. 2) #56–57; Onslaught: Epilogue #1; Onslaught: Marvel #1; X-Men: Road to Onslaught #1 Uncanny X-Men #168–175, Uncanny X-Men Annual #7; Marvel Graphic Novel No. 5 - X-Men: God Loves, Man Kills; Wolverine (vol. 2) #1–4 Lucas Bishop, Sam Guthrie/Cannonball, Kurt Wagner/Nightcrawler, Rachel Summers, Tessa/Sage, Ororo Munroe/Storm, James "Logan" Howlett/Wolverine

I love how these editions are collecting Chris Claremont's peak X-Men straight through. The first 3rd of this is his fantastic collaboration with John Byrne. The Dark Phoenix Saga and Days of Future Past are the two most iconic stories in the X-men's iconic past. And then John Byrne ends his run on my first X-Men comic, Demon where Kitty Pryde is left alone in the mansion being chased by the N'Garai. It's the first time you really get to see what a badass she could be. Her fear also really shines through. As an 8-year old boy this issue used to terrify me.