Rowling will release the first of the series on the Pottermore website tomorrow. The following pieces will be released at the same time daily until Friday.
The series will cover magic-related topics such as the Salem witch trials and native American legends.
The series is a prelude to the release of "Fantastic Beasts and Where to Find Them".
The film will be in cinemas in November and star Eddie Redmayne as "magizoologist" Newt Scamander, who writes a Hogwarts School textbook about the weird and wonderful fictional creatures he encounters.
A post on Pottermore read, "Magic in North America will bring to light the history of this previously unexplored corner of the wizarding world in the run-up to Fantastic Beasts And Where to Find Them."And you'll want to get up to speed before the film comes around in November."
Other topics to be covered in Rowling's series will include Ilvermorny, Rowling's name for the North American wizarding school, and The Magical Congress Of The United States of America, her US equivalent of the Ministry of Magic.