The Day Watch

In modern Moscow, the Others live unseen among humans, bound to Light or Dark and policed by the rival Night Watch and Day Watch under an ancient treaty. A routine Night Watch arrest turns into a battle that leaves young Dark witch Alisa drained of power, and at a Black Sea youth camp she meets Igor, only to learn he is a Light mage.

The second book of Sergei Lukyanenko's Night Watch series, written with Vladimir Vasilyev, is told this time from the Dark side and is the only book in the series not narrated mainly by Anton Gorodetsky. It is made up of three linked stories: Alisa's, that of Vitaly Rogoza, a man with no memory who joins the Day Watch, and an Inquisition trial in Prague that examines what happened in the first two.