Not all monsters are easy to spot - some of them live among us, undetected or long forgotten. Some of them live inside us, in the dark corners of our hearts, feeding on our secret fears of loss. But in the Marvel Universe, most of them live on Monster Island. Or, at least, they did. A mysterious exodus is under way; monsters spilling onto nearby shores - with catastrophic results - and it falls upon a small group of X-Men to both save the population from destruction and solve an imposing riddle: What are monsters afraid of? Get ready for a widescreen blockbuster filled with classic monsters, heart-stopping revelations and over-the-top action! Collecting: Astonishing X-Men 36-37, 39, 41