The House Of Power (Atherton, Bk. 1)

Edgar, a gifted climber, secretly scales the treacherous walls separating the three worlds of Atherton: the humble grove that is his home . . . a mysterious highland realm of untold beauty and sinister secrets . . . and a vast wasteland below, where a monstrous danger lurks that could destroy them all. While searching the forbidden cliffs for a treasure lost in his faded memory, Edgar discovers the first of many startling revelations to come; the three realms are beginning to collapse, turning his entire world inside out. Atherton is not what it seems, but something far more dangerous, with a history locked inside the mind of a madman and a future beyond Edgar's wildest imagining.