Harley Quinn - The Joker's Last Laugh vol.5 TPB

MAD LOVE!Mason Macabre is more than just Harley Quinn's neighbor in
her new Coney Island digs-he just might be the man of her dreams. But to
save his life, she'll have to face the clown of her nightmares! With
Harley and her gang of merry maidens battling to keep innocents out of the
crossfire of her enemies' latest vendetta, Mason's been whisked away
to the one place our hellacious heroine never wanted to set foot in again:
Arkham Asylum. Inside its horrific halls, Mason is at the tender mercy of none
other than the Joker-and Harley and the Clown Prince of Crime have had the
mother of all bad break-ups.Will she and the madman who helped make her what she
is kiss and make up long enough for her new beau to escape with his life? Or
this time will the joke be on Harley Quinn for good? It's the reunion
you've been waiting for! Courtesy of acclaimed creative team Amanda Conner
and Jimmy Palmiotti, HARLEY QUINN VOL. 5: THE JOKER'S LAST LAUGH proves
that when it comes to true love, Harley's not joking around! Collects
issues #22-25 of the ongoing series and the special issue HARLEY QUINN: BE
CAREFUL WHAT YOU WISH FOR.