Hardcover collecting Giant-Size X-Men #1 & 3-4, Classic X-Men #1, X-Men Origins: Colossus, X-Men Origins: Wolverine, X-Men: Deadly Genesis #1-6; What If? #9 & 23 and material from X-Men Gold #1.
— Description from Comic Vine community (comicvine.gamespot.com · https://comicvine.gamespot.com/giantsize-xmen-40th-anniversary/4050-82296/).
