The Earthenseers

Sam Brayshaw leads a mundane life in a grimy London suburb, with a job that doesn't suit him. As his affinity with nature leads to abilities he never knew he possessed, he gets drawn unwittingly into a power struggle between two ancient and powerful cults. Meanwhile, a dark threat is watching and waiting from a billion light years away, and it will only be satisfied with the total obliteration of all life on Earth.