Collects X-Men: First Class (Vol 2) #11-16 and X-Men: First Class Giant-Size Special #1.
*In this volume, the fledgling X-Men encounter Machine Man, Medusa and the enigmatic Mysterio! Guest starring Spider-Man and the Fantastic Four! Plus the Beast starts conducting investigations into his own "X" files around the world! Are there aliens among us - or things even weirder? *Source: Back Cover