Trade paperback collecting X-Men Unlimited #2-14, Giant-Size X-Men #3-4, Mythos: X-Men and material from Free Comic Book Day 2006 (X-Men/Runaways).
— Description from Comic Vine community (comicvine.gamespot.com · https://comicvine.gamespot.com/astonishing-x-men-companion/4050-126608/).
