All comics in this event are on Marvel Unlimited. If you are familiar with the characters you could get away with just reading issues 141 and 142.
|Uncanny X-Men 138||Basically recap of all comics to date.|
|Uncanny X-Men 139||Mainly introduces Kitty Pryde, side story with Wolverine.|
|Uncanny X-Men 140||A few pages with more Kitty, mainly finishes Wolverine's story.|
|Uncanny X-Men 141||Main story starts in this issue.|
|Uncanny X-Men 142||Main story concludes in this issue.|
|Uncanny X-Men 143||Not really part of the event, Kitty solo fights a Demon monster.|