Surprisingly good: Crichton's version of Beowulf, told from the perspective of an Arab traveller who gets taken along on the famous journey. The book strikes a decent balance among several things: the voice of an old epos and modern pacing; displaying the clash between the two cultures while also being an adventure book; proposing plausible origins for the myth while also making them sound sufficiently magical. Neanderthals as the origin of Grendel were a particularly neat touch.