The Kindle is the perfect holiday and leisure gadget, except for two things: the sea and bath tubs can really put the hurt on it. Why is why second only to a light, there's almost no more important accessory for a Kindle than a water-resistant cover like this one from Case Logic.
Thick plastic, easy to grip neoprene case, double ziplock-type seal. Perfect, otherwise.
Hard to power on and wake from sleep through the plastic cover.