Creepy and depressing. Normally my kind of thing. But it was unrelentingly (?) bleak. Weird, early entry in the "lost world" genre of sci fi. A sailor gets accidentally abandoned (in Antarctica, no less), and discovers a lost civilization of well-mannered, generous, fun-loving people. But it turns out these people have the exact opposite view of life and death that we do: death is a blessing to be chased after, wealth is a mark of low class, and service and slavery is the highest office one can achieve. So imagine a whole book full of human sacrifice, cannibalism, ruminations of how wonderful death and slavery are, and couch it in the disguise of an adventure novel. Fun.