A Lord from Planet Earth

A Lord from Planet Earth is a trilogy of science-fiction novels by Russian writer Sergey Lukyanenko. Although predominantly science-fiction, the novels also include some elements of the fantasy genre. They are only available in Russian.
The trilogy consists of:A Princess Is Worth Death The Planet which Doesn't Exist Glass Sea
The initial draft of the first novel was written as a fantasy novel. However, Lukyanenko, then decided that the science-fiction version was better. The fantasy draft was subsequently lost.