Flashforward

Robert Sawyer's novel takes a starting situation I found pretty interesting (due to an experiment gone wrong, everyone in the world gets a two minute glimpse of their lives 21 years in the future), and uses that as a springboard to examine the conflict between free will and determinism.

And it's soon to be a TV series. The book provides an excellent tapestry for a show, and so far it seems to be making changes that make it (a) less cerebral, and (b) more likely to sustain a 3+ season TV series.

Flashforward's inspired me to seek out other sci-fi novels with strong 'What if' premises and good characterisations. Anybody got any suggestions?