Most of my work lately has been making an epub from the CCEL text. ldrdb.epub

The LIFE AND DIARY of The Rev. David Brainerd - contained in
Works of Jonathan Edwards, Volume Two - available from CCEL - http://www.ccel.org/ccel/edwards/works2.ix.html http://www.ccel.org/ccel/edwards/works2

LIFE OF REV. DAVID BRAINERD: chiefly extracted from his diary (1830?)
Published by the American Tract Society
Author: Brainerd, David, 1718-1747; Edwards, Jonathan, 1703-1758

3 scans of different copies of the same book...
http://www.archive.org/details/lifeifrevbrainerd00brairich
http://www.archive.org/details/lifeofrevdavidbr00braiiala
http://www.archive.org/details/lifeofrevdavidbr00brai

Along with the Brainerd text, the brairich scan contains "Treatise on Keeping the Heart" by John Flavel. I have not included that in the epub I have edited.

An Account of the life of the late Reverend Mr. David Brainerd. - By Jonathan Edwards, A.M. Minister of the Gospel at Northampton.  Boston:  N.E.  Printed for and Sold by D. Henchman, in Cornhill, 1749.

The Life of David Brainerd, Missionary to the Indians; chiefly taken from his own diary and other private writings. - (1858 - London: T.Nelson)

Memoirs of Rev. David Brainerd, Missionary to the Indians of North America (1884) - Funk & Wagnalls, (Jonathan Edwards, Sereno Dwight) edited by James M. Sherwood.

The Life and Diary of David Brainerd - Jonathon Edwards, Sovereign Grace Publishers Inc. (Dec 1, 2000)
softcover available from Hendrickson Publishers.

The Life and Diary of David Brainerd - Jonathan Edwards, Baker (1989 paperback)