Uncanny X-men by Bill Sienkiewicz, 1984
My first ever trade paperback. I had been reading Silvestri-era X-Men and this story was completely new to me. I read it all in a day.
I still have the book.
It still bugs me that Colossus is placed asymmetrically.
Heyyyy, my first ever trade paperback too. Still have it in a box somewhere, will probably never read it again to preserve my previous affection for it. Everything in here felt SUPER ADULT when I got it.