Garth Ennis’ first Punisher comic isn’t his best, but it was groundbreaking. You can see the origins of Ennis’ “The Boys” comic here: In this universe, Frank Castle’s family is killed as collateral damage during another big superhero battle, and he becomes Punisher to get revenge. It’s simple. It’s funny. It’s creative. It’s amazing.
It’s been reprinted several times–track down a copy.