Books can be attributed to "Unknown" (no period) when the author or editor (as applicable) is not known and cannot be discovered. If at all possible, list at least one actual author or editor for a book instead of using "Unknown".
Books whose authorship is purposefully withheld should be attributed instead to Anonymous.
the mabinogion is a collection of welsh medieval stories, written down out of the oral tradition. there is a lot of arthurian legend involved. there are giants, and witches, and talking animals, and knights and impossible feats. this is translated from the welsh. it's nice to get things - especially the arthurian tales - with a welsh flavor to them.
my favorite lines:
"god knows," said owain, "she is the woman I love best." "god knows," said the maiden, "there is no way she loves you, not in the very slightest."