A sky with no light

Are there still unexplored regions of the world?Is there a land beneath the sky that the sun''s rays do not reach?Why was Professor Ashraf Safi so certain of the lost island''s existence, and how did he spend fifteen years of his life searching for it?"Before his eyes appeared Rowan''s necklace, made of distinctive stones, shining with a strange, unfamiliar luster. He wondered in amazement, "Do th...