Born in the Bronx, he has spent time in the big city and the suburbs, and now lives in western Massachusetts with his wife, fellow writer Sarah Kinney, and their daughters.

At times he has been a tech writer, an educational writer, a public relations writer and an editor for trade journals, but his preference is for fiction in all its forms.

• Making God (Between the Lines, 1997)
• Dark Ages: Assamite (White Wolf, 2002)
• Haunting the Dead: The Grass is Always Greener (White Wolf, 2003)
• The Tunnel at the End of the Light in the Time Hunter series (Telos Publishing, 2004)
• TimeTripper series

Yestermorrow (Penguin/Razorbill 2006)

InRage (Penguin/Razorbill 2006)

BlindSighted (Penguin/Razorbill 2006)

FutureImperfect (Penguin/Raozrbill 2007)

• The Shadow of Frankenstein (Dark Horse Books 2006)
• Wicked Dead series (HarperCollins 2007-2008)
• Teen, Inc. (Walker Books for Young Readers, 2007)
• The Rule of Won (Walker Books for Young readers, 2008)

Graphic novels/comic books

• Squalor 4 issue limited series with Tom Sutton (First Comics, 1989-90)
• Meta-4 on-going series with Ian Gibson, cancelled after 3 issues. (First Comics, 1990-91)
• Lance Barnes, Post Nuke Dick mini-series with Barry Crain (Epic Comics, 1993, collected edition Moonstone Comics, 2004)
• Duckman (Topps, 1994)
• X-Files (Topps Comics 1995-96) - also collected in trade paperbacks
• The Bandy Man (Caliber Comics, 1996)
• Kolchak: The Devil in the Details (Moonstone Comics, 2002)
• Mickey Mouse and Friends, Donald Duck and Friends, Walt Disney's Comics and Stories and other Disney comics (Gemstone Publishing, 2003-2008); stories originally written for Egmont Publishing 1994-2007
• Nancy Drew, Girl Detective graphic novel series (Papercutz, 2005 onwards)
• Beowulf graphic novel (HarperCollins, 2007)