In line with other reviews so far, I thought this was an excellent book. Set in Istanbul in 2027 5 years after Turkey joins the EU, it covers multiple, linked story-strands covering subjects such as religion, politics, nano-tech, economics, terrorists and legends including the Mellified Man (don't bother looking it up, just enjoy it in the book).
There are numerous characters who are faily well sketched - the ousted academic, the child detective with a heart complaint, the stock market swindler and his religious-artefact selling wife, the disturbed fanatic and the nano-tech entrepeneurs. McDonald weaves their stories very skillfully and vividly paints a picture of near-future Istanbul and the integration of new technology into an ancient city.
I really enjoyed "River of Gods" but couldn't finish "Brasyl" for some reason. But this is by some way the best book I have read this year. McDonald successfully merges good story-lines with believable future-technology and writes it well. Any author who can come up with a line such as "Smell is the djinni of memory, all times are one to it" has my admiration.
If you want intelligent, well-written near-future science-fiction, you can't go wrong with this book. Highly recommended.