tell me a little about Glasshouse?
Robin wakes up from memory surgery not entirely sure who he is or what he was trying to forget, but pretty quickly works out that someone is still trying to kill him. Decides to sign up for a social experiment that will have him locked in a closed habitat for three years recreating a "dark ages" (approximately 1950-2050) society with hundreds of other volunteers. (Figures he'll be safe in there - he won't be able to get out, but they (whoever they are) won't be able to get in either.) Wakes up inside the experiment as a woman (not exactly what he was expecting, but oh well!) and has to learn to live as a dark ages female while his memories start to come back as dreams, all the while slowly realizing that there's more going on with this "social experiment" than he was led to believe when he signed up.
It's one of the best-realized post-singularity societies I've ever read, and Stross' POV of a modern posthuman trapped inside the body of a 20th century woman is amazingly dead-on. I just loved every second of it.