Robot Girl (2015)

Jon For Short (2013)

Hostage (2006) 

Cloud Busting (2004)

The Monster Crisp-Guzzler (2002) 

Dead Gorgeous (2002) 

Pig Heart Boy (1997)

A.N.T.I.D.O.T.E (1996)

Thief! (1995)

Trust Me (1994)

Hacker (1992) 

Noughts & Crosses Series

Crossfire (Noughts and Crosses) (August 8, 2019)
Callum: A Noughts and Crosses Short Story (2012) 

Double Cross (2008) 

Checkmate (2005) 

Knife Edge (2003) 

An Eye for an Eye (2003) 

Noughts & Crosses (2001)

Boys Don't Cry Series

Heart Break Girl (2014) 

Boys Don't Cry (2010)

Girl Wonder Series

The Amazing Adventures of Girl Wonder #4 (2003) 

Wonder to the Rescue #3 (1994) 

Girl Wonder's Winter Adventures #2 (1992)

Girl Wonder and the Terrific Twins #1 (1991)