A brave, daring story of a city in a world without colours.
Well-portrayed, developing main characters who won't give up until the end!
The author has an excellent writing style, despite some initial hickups in the Prologue, which, once you overcome this is definitely a great read.
I can definitely recommend it to those who wish for something different in the fantasy genre.

What's surprising about the story is that it could turn out to be true. As we depend on computers more and more, we take for granted that our private data is in safe hands. But what happens when one man is set out to destroy them all? Certainly not a crisis, we reply.
And we are right: this is not a crisis. This is cloud crash.
When one thinks of thrillers with cryptic mysteries, Dan Brown always seems to slip into first place. This book however, is a very nice proof that there are other authors who can write equally, if not more, enjoyable stories. True, there are a few noticeable things which may hint at the author's journalist background, such as the sometimes seemingly pattern-based description of characters, but all in all the plot and the characters are well designed, with sprinkles of humour which last till the end.