The premise is fascinating, and the prose is as lush and tangled, and as beautiful in its way, as the weird patch of jungle on the Alaskan coast where the Not-So-Good Ship Viator has run aground under mysterious circumstances. However, another reviewer nailed it when she said that this would have made an excellent short story -- almost every scene outstays its welcome, and every exchange of dialogue goes on and on and on.
There's a big difference between stories about madness, and stories that risk driving you mad.
There's a big difference between stories about madness, and stories that risk driving you mad.