Vincent Carretta, author of a well-received 2005 biography of Olaudah Equiano, has published the first scholarly biography of Phillis Wheatley, the result of diligent digging in previously-unconsulted sources throughout the Atlantic world. Tara Bynum's review of the book is here:

http://www.common-place.org/vol-13/no-01/reviews/bynum.shtml

The book will prompt all historians and family researchers to consider to consider less-well-known sources in imaginative ways.