Deadpool Vol. 4: Monkey Business
 
Collects Deadpool (2008) #19-22 & Hit-Monkey.
Not many people - hero, villain, mercenary or otherwise - are going to upstage the Amazing Spider-Man in a team-up. But Deadpool will have to if he'll survive the most dangerous threat he's ever faced - Hit-Monkey! Plus: The origin of Hit-Monkey revealed!