The third book in the bestselling Russian trilogy that is part fantasy, part vampire story, and part detective story, tells of an ancient race of humans who have supernatural powers and swear allegiance to either the Dark or the Light. In "Twilight Watch," they face their greatest threat yet.

Sergey Lukyanenko (Russian: Сергей Лукьяненко) is a science fiction and fantasy author, writing in Russian.

He was born in Kazakhstan and educated as a psychiatrist. It is said[citation needed] that his work has been heavily influenced by that of Robert A. Heinlein, Strugatsky brothers, and Vladislav Krapivin. Lukyanenko is surprisingly tolerant of fanfiction, going as far as to incorporate some of the better fanfics into his canon.