I second Shimrod's championing of the Dervish House (in fact it was Shimmy who put me onto it - thanks!). I wish more sci-fi/speculative fiction was half as good as this.

On a similar note, I'm now finally getting round to reading China Mieville's 'The City and the City'. Brilliant. I like everything I've read by him (Kraken, Perdido Street Station) but this far and away the best. A tale of two separate cities sharing the same geographical space...