Edith Hamilton's collection of Greek and Roman stories covers the gods, creation, and earliest heroes; stories of love and adventure, the great heroes before the Trojan War, the heroes of the Trojan War, the great families of Mythology, the 'less important' myths, and the mythology of the Norsemen. There are over 100 Greek/Roman/Norse stories, and a family tree and glossary of all the gods and goddesses included. A bonus was the illustrations which were really detailed. I read this book because I wanted an introduction to the Greek gods and goddesses before reading the PercyJackson and Olympians series, and I think it's a great book to gain somefamiliarity with the mythological characters.
My favorite short stories were: The Underworld, Cupid and Psyche, Pyramus and Thisbe, Perseus, Theseus, Hercules, and Antigone.