9780061983641 | Harpercollins, October 6, 2009, cover price $10.99

9780060195625 | 1 edition (Harpercollins, February 1, 2003), cover price $25.95 | About this edition: Twenty-eight-year-old multiple personality disorder sufferer Andrew Gage struggles to stabilize his life while coming to terms with the events that triggered his disorder and entering into a relationship with Penny Driver.

9780060954857 | Reprint edition (Perennial, February 1, 2004), cover price $14.99 | About this edition: Twenty-eight-year-old multiple personality disorder sufferer Andrew Gage struggles to stabilize his life while coming to terms with the events that triggered his disorder and entering into a complex relationship with Penny Driver, who does not know that she, too, suffers from the disorder.