The Furies stem from Greek mythology and are represented by three sisters who guard and judge those who arrive the gates of Hades, and torture for eternity those who had commited crimes.  Famous Greek myths are told to explain this vengeance.  Greek gods were both benevolent and naughty, but it mattered not who you were, judgment day would come and it would do no good to plead for forgiveness.  The stories are rivoting and as it is pointed out, Greek mythology is still as strong today as it was thousands of years ago.  It is the basis for much of our language and appears in much of media.  This book is an excellent addition to any library collection as it does such a good job of explaining all the confusing relationships.