- Letters
- ?
Half-title page.
- Pencils
- Bill Sienkiewicz (credited, signed)
- Inks
- Bill Sienkiewicz (credited, signed)
- Colors
- Bill Sienkiewicz (credited, signed)
- Letters
- typeset
- Genre
- superhero
- Characters
- Mad Hatter [Jervis Tetch]
- Reprints
- Script
- Landry Walker (credited as Landry Quinn Walker)
- Pencils
- Keith Giffen (credited)
- Inks
- Bill Sienkiewicz (credited)
- Colors
- David Baron (credited)
- Letters
- Pat Brosseau (credited as Patrick Brosseau)
- Genre
- superhero
- Characters
- Batman [Bruce Wayne]; Cathryn; Mad Hatter [Jervis Tetch] (villain); Joker (villain)
- Reprints
- Pencils
- Claudio Castellini (credited)
- Inks
- Claudio Castellini (credited)
- Colors
- Alex Sinclair (credited)
- Genre
- superhero
- Characters
- Harley Quinn [Harleen Quinzel]
- Reprints
- Script
- James Patrick (credited)
- Pencils
- Joe Quinones (credited)
- Inks
- Joe Quinones (credited)
- Colors
- Alex Sinclair (credited)
- Letters
- Pat Brosseau (credited as Patrick Brosseau)
- Genre
- superhero
- Characters
- Batman [Bruce Wayne]; Harvey Bullock; Dr. Jeremiah Arkham; Harley Quinn [Harleen Quinzel] (villain); Joker (villain); Spider (villain); Mr. Falcone (villain); Joey (villain)
- Synopsis
- Harley breaks out of Arkham so she can spend Valentine's Day with her puddin'.
- Reprints
- Script
- ?
- Pencils
- Ethan Van Sciver (credited, signed)
- Inks
- Ethan Van Sciver (credited, signed)
- Colors
- Tomeu Morey (credited, signed)
- Letters
- ?
- Genre
- superhero
- Characters
- Riddler [Edward Nigma]
- Reprints
- Script
- Peter Calloway (credited)
- Pencils
- Andres Guinaldo (credited)
- Inks
- Raúl Fernández (credited)
- Colors
- Tomeu Morey (credited)
- Letters
- Pat Brosseau (credited as Patrick Brosseau)
- Genre
- superhero
- Characters
- Riddler [Edward Nigma] (villain); Batman [Bruce Wayne]; Jessica Duchamp; Mr. Duchamp (death); Commissioner James Gordon; Joker (villain); Two-Face [Harvey Dent] (villain, cameo); Penguin [Oswald Cobblepot] (villain, cameo); Ra's al Ghul (villain, cameo); Deadshot [Floyd Lawton] (villain, cameo); Poison Ivy [Pamela Isley] (villain, cameo); Harley Quinn [Harleen Quinzel] (villain, cameo); Bane (villain, cameo); Killer Croc [Waylon Jones] (villain, cameo); Clayface [Basil Karlo] (villain, cameo); Mr. Freeze [Victor Fries] (villain, cameo); Scarecrow [Jonathan Crane] (villain, cameo); Black Mask (villain, cameo)
- Reprints
- Pencils
- Francesco Mattina (credited)
- Inks
- Francesco Mattina (credited)
- Colors
- Francesco Mattina (credited)
- Letters
- typeset
- Genre
- superhero
- Characters
- Killer Croc [Waylon Jones]
- Reprints
- Script
- Mike Raicht (credited)
- Pencils
- David Yardin (credited); Cliff Richards (credited)
- Inks
- David Yardin (credited); Cliff Richards (credited)
- Colors
- José Villarrubia (credited)
- Letters
- Pat Brosseau (credited as Patrick Brosseau)
- Genre
- superhero
- Characters
- Batman [Bruce Wayne]; Commissioner James Gordon; Dr. Cross (first appearance, death); Joker (villain); Killer Croc [Waylon Jones] (villain); Edgar Mason (first appearance, villain, death); Juliette Mason (first appearance, villain, death); Mr. Callahan (first appearance, villain, death); Tommy (frist appearance, villain, death)
- Reprints
- Pencils
- Kelley Jones (credited, signed)
- Inks
- Kelley Jones (credited, signed)
- Colors
- Kelley Jones (credited, signed)
- Letters
- typeset
- Genre
- superhero
- Characters
- Batman [Bruce Wayne]; Clayface [Basil Karlo]
- Reprints
- Script
- Kevin Shinick (credited)
- Pencils
- Kelley Jones (credited)
- Inks
- Kelley Jones (credited)
- Colors
- Michelle Madsen (credited)
- Letters
- Pat Brosseau (credited)
- Genre
- superhero
- Characters
- Batman [Bruce Wayne]; Commissioner James Gordon; Sgt. Harvey Bullock; Joseph Williams (flashback); Clayface [Basil Karlo] (villain); Joker (villain)
- Reprints