There are few Bruce genealogy books that have been published over the years with lineages. They may be available through your local library or via the Inter library loan program. Some of these books are International and may be very hard to find. I have found and purchased many of the books below, however prices and quality of the book vary. Be cautious when ordering.
Many books are available new and used at most bookstores.
Published originally 1907, but available by Mercat Press, 1996. I am descended from George, so if you any questions please contact me Thomas Bruce . The Life of Henry Bruce born in Stafford County, Virginia, late 1700's, and was a Kentucky Pioneer. This book references David Kirkpatrick Estes Bruce. If you have any questions please contact me Thomas Bruce .