Open the cover, keep a open mind, and begin to read.
Mythology is about Greek mythology.
Greek Mythology does not come with a start date.
There is not one.
The Everything Classic Mythology book by Lesley Bolton or the Dictionary of Mythology by Bergen Evans.
1300 bce
It is fiction, even though the gods mentioned in the book were real gods in Greek mythology, and some of the stories in the book are similar to ones in Greek mythology.
Usborne Illustrated Guide to Greek Myths and Legends
Jeanie Lang has written: 'A book of myths' -- subject(s): Accessible book, Greek Mythology, Mythology
ChironCentaursCirceCadmusCalaisCalliopeCassiopeiaCastorCepheusCerberusCharonCharybdisChimeraClioClothoClytemnestraCronusCyclops
Try reading some of the epics, like Homer's Odyssey and the Iliad. Another good book on Greek mythology is Edith Hamilton's Mythology. See 'related links' for a good website on mythology.
Marilyn Coffey has written: 'A Cretan cycle' -- subject(s): Ariadne (Greek mythology), Daedalus (Greek mythology), Minotaur (Greek mythology), Poetry 'Marcella' -- subject(s): Accessible book
The four horsemen are actually part of the Apokalypse of John, also call the Book of Revelation. It has nothing to do with Greek mythology.