The Witch of Blackbird Pond by Elizabeth George Speare

This book is about a girl named Kit and she has a rich grandfather but he dies so she must sell all the land,animals,slaves and the mansion. after all that is done she goes to live with her aunt and uncle.
I can't tell you the whole thing so. After a while she gets used to it.she finds this older woman.
Her name is Hannah Tupper.but everyone calls her THE WITCH OF BLACK BIRD POND. But she is really just a kind woman.They also call her a Quaker. Later every child in town gets sick and a lot of people blame Hannah! So kit helps her get away, and she lives happily.