Immortal hulk 2

Once upon a time, Rick Jones was the Hulk‘s best friend. Now he’s dead and gone. And the Immortal Hulk wants to know why. But to obtain the answers he seeks, Bruce Banner will have to face roaming gamma experiments, a ruthless assassin out for his blood... and the one thing that can cage the Immortal Hulk. How far will he go to honour his friend? 

Collecting: THE IMMORTAL HULK #16-30.