O Thou Improper, Thou Uncommon Noun

A happy story: I started The Lightning Thief, a children's book,and then received this book. The first chapter of O Thou deals with words taken from Greek gods, and each entry in the chapter tells a little about each god and why he was important. The Lightning Thief is the story of a boy who is half-god and he is being sought by many other Greek mythological creatures. O Thou gave me enough info about each god and mythological creature mentioned in The Lightning Thief to help me anticipate events in the story. Very nice.