Uncanny X-Men - Chris Claremont I.

X-Men v1 #94-100.

Issue number 94 of X-Men, cover dated August 1975, was big; it was the opening volley of Chris Claremont's run on the title, which would go on to last a whopping 16 years and close to 200 issues. Len Wein, the writer of Giant Size X-Men 1, plotted the first two issues, and Dave Cockrum remained on board doing the art. Bill Mantlo was credited as a co-plotter for #96.

Another interesting point of note: between issues 94, which was edited by Wein, and 101, when Archie Goodwin took over, the book's editor was none other than Marv Wolfman. Wolfman later went on to greatness in the early 80s with, among other things, DC's New Teen Titans, which was very much a spiritual compatriot of Claremont's X-Men. Also, his name is really cool.

The relaunched book was bimonthly to begin with, all the way until #112.

The late seventies were a weird and wondrous time for X-Men fans. Most everything they knew was gone, and the revamped version they were stuck with was surprisingly good. The title stayed under the radar for a while, but unexpectedly, it kept getting better and better. In time, it became a true leader of the industry. There is some debate nowadays about how well Claremont's writing has aged. Personally, I think this period of his creative career, the first ten or so years of the X-Men, was unambiguously fantastic and remains a high water mark for superhero comics to this day. Plenty of people, however, are turned off by his wordy style and certain idiosyncrasies which we'll discuss at length over time.