Cover By Adam Kubert. Mark Millar and Chuck Austen (w)/. Adam Kubert, Essad Ribic and Chris Bachalo(p). To win humanity's trust, The X-Men take their first-ever, world-spanning field trip - and face Professor X's greatest secret! Collecting ULTIMATE X-MEN #13 - #20! ULTIMATE X-MEN has that dark edge that only Mark Millar's best Authority stories once enjoyed. -Comics International. 192 PGS./FC/MARVEL PG