Books like last watch

Last Watch (Russian: «Последний Дозор», also known as Final Watch) is a fantasy novel by Russian writer Sergey Lukyanenko. It is the sequel to Night Watch, Day Watch, and Twilight Watch and prequel to New Watch and Sixth Watch.

The entire saga is devoted to the Others - humans able to draw on the magical force flowing through the world. They can enter into the Twilight, a shadowy dimension next to our own, from where they also draw power to perform their magic. The Twilight itself is divided into levels, with each level harder to access than the one above it. While every Other may enter the first level, only the most powerful ones can get as far as the fifth, and the select few can get through to the sixth. While the first levels are unpleasant and devoid of life (apart from blue moss in the first level), fifth and sixth levels are quite hospitable, with life and vegetation. The main mystery of the final novel is what is on the seventh level- only the greatest of magicians can penetrate to the seventh level.