Tamora Pierce's Circle series

[Kreader]

I read these years ago and came across another book recently. It's about four children mages, Sandry, Briar, Tris and Daja brought together to live in a house in a mage community. It starts of with Circle of Magic which is Sandry's book.

 

http://www.tamora-pierce.com/about_circle.html

 

Each of them has a book. There is a follow on series called The Cirlce Opens.