I've read the first two books in the "Prophet of Ice" series. They're an interesting but shallow Dune rip-off, very, very violent, set in a crazy frozen-ocean-with-skiing-boats-with-cannons world, where all knowledge is kept by crazy monastic orders. There is the Saint-boat-builder order, the Saint-Gunner order, so on.
It's not bad, but not really worth the time.