This book is similar to The Clay Machine Gun, in that it focuses on metaphysics, indeed, it seems to be one long metaphysical conversation at times. It is written with Pelevin's usual poetic gift for prose and it adds occasional touches of humour which are in tune with the story's sexual overtones. But I should stress that although the story is about a millenia-old prostitute, the tone is rarely tawdry. It is essentially a love/reality transcendence tail (tee hee) albeit involving a werewolf and a foxy distant Chinese relative. The tone is fairly dark at times, but this may largely be due to the presence of Nordic mythology motifs, which, if you've read the Edda, are obviously nuts!
I would also urge you to purchase it, if merely for the fact that his publishers might get round to printing his other books if this sells well!
Also, the other review for this book is actually about Numbers, which hasn't been published yet, so don't expect any bankers and Pokemon. This is about werewolves, werefoxes and the FSB, fun!