In 2003, Cal illustrated the Gail Simone-written back-up story "Part Time" for Geek Punk's Super Hero Happy Hour #4.
Gail Simone has described him as "belong(ing) in (her) personal hall of fame".
From there, Barrows became an artist on the weekly series 52 and then teamed with writer Gail Simone on The All-New Atom.
Significant to the course content were the interviews with prominent comic book creators: Terry Moore author of Strangers in Paradise; Mark Waid, writer for Superman; Kelly Sue DeConnick, Steve Wacker, and Sana Amanant, creators of the new Captain Marvel; Gail Simone author of Secret Six; Scott Snyder author of Swamp Thing; and Brian K. Vaughn author of Y: The Last Man.
Nina Simone | Simone de Beauvoir | Simone Signoret | Simone Weil | Gail Porter | Gail Kim | Gail Emms | Simone Martini | Gail Simone | Gail Jefferson | Gail Borden | Simone Perrotta | Gail Simmons | Gail Sheehy | Gail Potocki | Gail Neall | Gail Godwin | Gail Dines | Gail Berman | Simone Beck | Max Gail | Mark Simone | Gail Z. Martin | Gail Zappa | Gail Farrell | Gail Carson Levine | GAIL | Simone Young | Simone Veil | Simone Maludrottu |