The World Below
by S. Fowler Wright
When George moves to a distant Earth, he finds himself caught between two different types of humanity — amphibians, inhabitants of the depths, and giant inhabitants, rulers of a huge island that makes up the bulk of its land mass. With the help of one of the amphibians, George goes in search of any signs of the two previous time travelers, neither of whom have returned. Their adventures among the gorgeous flora and fauna of this brave new world form one of Wright's most original and compelling figurative fictions.