Hitman
DC Comics. Written by Garth Ennis, drawn by John McCrea.
Hitman
(Demon Annual 2, Contagion 4, Hitman 1-3). [From DC Comics:
On the back streets of Gotham City, ex-military operative Tommy Monaghan
has set himself up as a hired gun. Surrounded by an odd assortment of friends
and allies, the Hitman with a heart must deal with personal conflicts over
honor and morals as he makes a living with a gun. But even with the telepathic
ability to read his targets' minds, he still finds himself well over his
head when he runs into some of Gotham's most notorious citizens such as
the Demon, the Joker, and the Dark Knight himself, the Batman. Blending
witty humor with offbeat action, this trade paperback takes a look at the
everyday life of a man who lives to kill.] 
10,000
Bullets (4-8). [From DC Comics: In HITMAN: 10,000
BULLETS, hit man Tommy Monaghan uses his powers of telepathy and x-ray vision
to survive an all-out attack on him and his friends. This second volume
in the HITMAN series finds the tables turned on Tommy as a vindictive mob
boss from his past puts a contract out on him. With his friends caught in
the crossfire, Tommy must find a way to take out the hired assassin and
exact retribution against the mafia head. But even with his extrodinary
powers, the Hitman may find that a trained killer and a mob army is just
too much for one man.] 
Local
Heroes (9-14, Annual 1). [From DC Comics: Combining
incredible humor, witty dialogue and quick-paced action, HITMAN: LOCAL HEROES
tells the story of Tommy Monaghan, a hit man with superpowers and morals.
In the third installment of the HITMAN series, the diversity of Tommy's
talents is tested as he faces off against Western outlaws and an army of
zombie sea animals. Also included in this book is a hilarious confrontation
with Green Lantern, which teaches the Spandex-clad super hero a lesson about
taking on a street-smart hit man from the back streets of Gotham City.]
Ace
of Killers (15-22). [From DC Comics: When Hell
has a score to settle with one of the living - namely gun-for-hire Tommy
Monaghan - things turn ugly in a hurry in HITMAN: ACE OF KILLERS, a thrill-packed,
blood-drenched trade paperback reprinting issues #15-22 of the monthly series.
Written by Garth Ennis, with art by John McCrea and Steve Pugh, ACE OF KILLERS
opens with the hellspawned Arkannone, anxious to make Tommy pay for his
offenses against them, sending the demonic Mawzir on a mission of revenge.
Catwoman also appears in the main story, as the Demon Etrigan teams up with
Section Eight's Baytor(!) to retrieve the one Infernal weapon - hidden deep
in the heart of Hell - that can stop Mawzir: the Ace of Winchesters, a gun
also known as "the Ace of Killers." But does Etrigan have another
use in mind for the weapon? Plus, after the Mawzir is taken care of, Tommy
and Tiegel review their tumultuous semiromantic relationship; and, closing
the collection, a holiday story told entirely in rhyme shares the heartwarming
tale of Tommy, Natt and a radioactive Santa.] 
Who
Dares Wins (23-28). [From DC Comics: HITMAN:
WHO DARES WINS is a tale of honor, revenge, camaraderie and conscience as
played out in the alleys of Gotham City. When both a group of S.A.S. British
commandos and an avenging troop of mafia soldiers target hit man Tommy Monaghan
and his best friend and partner, Natt, the two odd couple assassins stand
side by side in a fight they know they can not win. With their deaths imminent,
the two friends who have made a living through death examine their existence
and the lives they've led.] 