First and only annual to the X-Treme X-Men series. All X-men annual's that year where published in a horizontal way, as was this one.
Collected in X-Treme X-Men: Prisoner of Fire.
— Description from Comic Vine community (comicvine.gamespot.com · https://comicvine.gamespot.com/x-treme-x-men-2001/4050-27047/).
