Written by Roy Thomas. Art by Neal Adams and Tom Palmer. This unique hardcover volume collects the 1st Neal Adams work on Marvel's Merry Mutants, and features the 1st appearance of Scott Summer's hot-headed little brother Havok in costume, the 1st appearance of the diabolical Larry Trask, and the menacing threats of the Living Monolith, Mesmero, and the robotic mutant-hunters known as Sentinels!