Rebel Planet, Puffin Books (Puffin Fighting Fantasy Gamebook 18), 1985 (French ed., Gallimard 1986; U.S. ed., Dell 1986; computer game, Adventure Soft 1986; Japanese ed., Shakai Shiso Sha 1987; Danish ed., Borgen 1987; Portuguese ed., Verbo 1991; Brazilian Portuguese ed., Marques-Saraiva, 1992; Czech ed., Perseus 1997)

Masks of Mayhem, Puffin Books (Puffin Fighting Fantasy Gamebook 23), 1986 (French ed., Gallimard 1987; Japanese ed., Shakai Shiso Sha 1988; Danish ed., Borgen 1988; German ed., Thienemann 1989; Hungarian ed., Taketa 1992; Portuguese ed., Verbo 1993; Hebrew ed., Opus 1993; Czech ed., Perseus, 1999)

Phantoms of Fear, Puffin Books (Puffin Fighting Fantasy Gamebook 28), 1987 (French ed., Gallimard 1988; Danish ed., Borgen 1989; Japanese ed., Shakai Shiso Sha 1989)

The Money Spider, with Wilfred Davies, Penguin Books (Penguin Plus), 1988 (Polish ed., eMPi2 1996)

The Water Spider, with Wilfred Davies, Penguin Books (Penguin Plus), 1988 (Polish ed., eMPi2 1996)

Deathmoor, Puffin Books (Puffin Fighting Fantasy Gamebook 55), 1994 (French ed., Gallimard 1996; Portuguese ed., Verbo, 2003)