Avengers - Thunderbolts v01 - The Nefaria Protocols (2004)

Collects Avengers (1998) #31-34 & Thunderbolts (1997) #42-44.
Collected here is the inaugural Avengers/T-Bolts crossover! The T-Bolts and Earth's Mightiest Heroes stand side-by-side against Count Nefaria, master of ionic energy! But before they can confront the Count, they'll have to deal with their own ion-empowered teammates, Atlas and Wonder Man - both of whom have fallen under Nefaria's thrall and now act as his henchmen. Featuring the all-time team of KURT BUSIEK & GEORGE PÉREZ!