Marvel, New York, 2007, 1^st pr thus.  ISBN 0-7851-2856-5.  Folio soft cover, unpaginated (336 pages).  Unread copy, small upper rear corner crease, touch of wear to laminate along edges.  Contains material originally published in magazine form as Ultimate X-Men #13-25; plus a bonus tale of Gambit who must use his mutant gifts to protect a homeless boy.  ‘As the X-Men embark on their inaugural world tour, they must confront some unsettling truths about their mentor, Professor Charles Xavier.  Before founding his school for young mutants, Xavier abandoned his only son, David, a mutant with uncontrollable reality-warping abilities.  Now, David has returned, looking to exact revenge on the father who left him – and he’s willing to eradicate anyone who stands in his way.’ (from rear wrap)