Hmmmm... My Dad was one of the first people on the planet to get a copy of the Cave of Departure (the big shipment still hasn't arrived, just the handful of samples...). Dad is the kind of person who loves to read books with maps - in fact, he was the one who drew the map that you'll find inside the front cover of Cave. The way he reads books like this is he'll stop each time he gets to a geographical reference and then locate the spot on the map. Well, it turns out, in the first 11 pages of the book he found a place where the text and map do not match exactly. A river is mentioned in the text that is not on the map (you can draw one in... it should run through the Sumbalon Valley west to the sea near Barenta.)... Ooops!