Set This House in Order

Andrew Gage, created two years ago, is the public face of a multiple personality. There are hundreds of souls in his head. In the world outside, Andy works on ambitious, but unlikely, virtual reality projects. There, new programmer Penny Driver turns out to be a multiple personality, too, and the boss wants Andy to help her. Several of Penny's other souls ask for help, which Andy finally, reluctantly, agrees to give, thereby setting himself on a path that threatens the stability of his house.

This book provides examples of the following tropes:

 * Awesome but Impractical: Julie's virtual environment project
 * Badass: Seferis, Maledicta, Malefica
 * Cluster F-Bomb: Maledicta
 * Dark and Troubled Past - obviously, but not sensationalized
 * Deadpan Snarker: Adam
 * Epiphany Therapy - beautifully averted
 * Fighting From the Inside:
 * Gollum Made Me Do It
 * Jerk with a Heart of Gold: Maledicta, Adam
 * Magic Realism (perhaps, probably not)
 * Man Child: Jake
 * Nice Guy: Andrew
 * Rape as Backstory
 * Shown Their Work
 * Split Personality - obviously
 * Split Personality Merge:
 * Split Personality Takeover: the original Andy Gage doesn't exist any more
 * Talking to Themself - a lot
 * The Ladette: Maledicta
 * Tsundere: Julie