For those interested in a few ancient sources of the myth, the earliest is the Homeric Hymn to Demeter (https://chs.harvard.edu/primary-source/homeric-hymn-to-demeter-sb/)

Ovid's is probably the most accessible

(https://ovid.lib.virginia.edu/trans/Metamorph5.htm#479128839)

Appollodorus offers a tight summary, and the editor provides lots of notes!

http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.01.0022%3Atext%3DLibrary%3Abook%3D1%3Achapter%3D5