It fills the narrative gap between the original 1963 series and the "Second Genesis" relaunch in Giant-Size X-Men #1.

Features Incredible Hulk #180–181 (and parts of 182), detailing the first full appearance of Wolverine. Iconic Crossovers:

This volume gathers stories from across the Marvel Universe where the X-Men played major roles:

This volume of the collection, published by Panini Comics , is a unique entry that focuses on the "transition era" of the team.