Twilight Watch

Night Watch and Day Watch, the first two books in this remarkable series, established Sergei Lukyanenko as a breathtakingly bold talent. Part fantasy, part vampire story, and part detective potboiler, this is the most successful science fiction series of all time in Russia and a true international sensation. In America, Fox Searchlight released the film adaptations of Night Watch and Day Watch to rapturous reviews.
The world of Lukyanenko is as elaborate and imaginative as Tolkien or the best Asimov: Living among us are the Others, an ancient race of humans with supernatural powers who swear allegiance to either the Dark or the Light. A thousand-year treaty has maintained the balance of power, and the two sides coexist in an uneasy truce.
In Twilight Watch, the Others face their greatest threat yet. A renegade Other, his identity as yet unknown, has absconded with a fabled spell-book of untold power and appears bent on attacking the entire earth. Now forces of the Light and the Dark -- the Night Watch and the Day Watch -- must cooperate to stop him. Anton, the hero from Night Watch, is back, but when the culprit turns out to be none other than his partner, the race against time becomes more urgent than ever. In a world where reality and magic commingle, and where different degrees of existence are layered one atop the other, nothing is ever quite what it seems.