I discovered that these books are available here at Ancestry.com, but are not in the Card Catalog, and are not searchable. (sort of making them invisible!)
Note: The overall collection in which they are grouped is entitled "U.S., Published Quaker Family Histories, 1845-1920" BUT they are NOT all U.S. works, and they are NOT all exclusively Quaker! (as far as I can tell)
If you would like to browse these works, go to:
http://search.ancestry.com/search/db.aspx?dbid=34683A Genealogical Sketch of the Family of Dr. Arthur Stevenson
A Genealogy of the Taylor Family of Monmouth
A Reminiscent Record of Joel and Caroline Warder Cadbury
A Short Account of the Family of Fry, of Ashgrove Wiltshire
A Short Account of the Fowler Family, 1550-1891
Additions to the Genealogy of the Biddle Family
Akroyd and Ecroyd Family
Andrew Moore and His Descendants Vol. 1
Andrew Moore and His Descendants Vol. 2
Annals of an East Anglian Bank
Annals of the early Friends Vol. 1
Annals of the early Friends Vol. 2
Annals of the early Friends Vol. 3
Atkinson Ancestors, 1908
Auto-Biographical Narrations of the convincement and other Religious Experiences
Biographical Memoirs: A record of the Christian lives, experiences, and Deaths of Members to 1653
Bloomfield, the Chambers Homestead at Kennett Square, Pennsylvania: Memories and Records, 1817-1920
Brief Memoirs of the Barclay Family
Clovercroft Chronicles, 1314-1893
Cooper Family Register
Edward and Eleanor Foulke: Their Ancestry and Descendants, 1698-1898
Eliot Papers: Compiled from Family Papers of Eliot Howard
Family Chronicles: Blecklys and Springalls, Section 1
Family Chronicles: Ingram Chapman´s Descendants, Section 3
Family Chronicles: The Chapmans of Whitby and their Descendants
Family Letters, etc. Vol. 1, Cadbury
Family Letters, etc. Vol. 2, Barrow
Family Letters, etc. Vol. 3, Cadbury
Family Letters, etc. Vol. 4, Cadbury
Family Letters, etc. Vol. 5, Gibbons
Family Memorials and Recollections: Aunt Mary´s Patchwork
Farm and Its Inhabitants with Some Account of the Lloyds Dolobran
First Reunion of the Wickersham Family
Fruits of Piety: Exhibited in a Collection of Narratives Respecting Children and Young Persons
Garrett Family Recollections
Gawthrop
Genealogical Record of the Hambleton Family, with Mention of other Hambletons
Genealogy of the Baily Family of Broham, Wiltshire, England
Genealogy of the Cadwalader Family Descended from John Cadwalader
Genealogy of the Fell Family in America
Genealogy of the Maule Family, with a Brief Account of Thomas Maule, of Salem, Massachusetts Vol. 1
Genealogy of the Maule Family, with a Brief Account of Thomas Maule, of Salem, Massachusetts Vol. 2
Genealogy of the William Tyler Family
George and Ralph Allen: One Line of their Descendants in New Jersey with Some Fragments of History
Glen Fern: Livezey House, on Wissahickon, East Fairmont Park, Philadelphia
Henry Baker and Some of His Descendant
Historical Genealogy of the Brown Family, Including A Brief History of Other Families
History and Genealogy of the American Descendants of John and Ann Chamness of London, England
History of the Borton and Mason Families in Europe and America
History of the Hodgson Family, 1665-1892
In Memoriam: The Sixty-Fifth Wedding Anniversary of Charles and Tacy Stokes
In the Old Time: A Short History of the Descendants of John Murray the Good
Leeds: A New Jersey Family
Memoirs of the Johnson Family with an Autobiography
Memorials of the Reading, Howell, Yerkes, Watts, Latham, and Elkins Families
Moore Chart
My Ancestors: Nicholson Family, 1675-1885
My Ancestors: Penney Family
Notes on the Genealogy of the Biddle Family, Together with Abstracts of Some Early Deeds
Our Ancestors the Stantons
Penn Family Pedigree
Quaker Worthies
Recollections of Spitalfields: An Honest Man and His Employers
Ringmer, the Springetts, and the Penns: A Chapter of Sussex History
Samuel Carpenter of Philadelphia and his Descendants
Some Annals of the Buffington Family
Some Colonial Ancestors of John Hopkins
Some Special Studies in Genealogy
The Barclays of Ury and other Sketches of the Early Friends
The Browns of Nottingham
The Cadbury Pedigree, 1904
The Cudworth Family
The Derivation of the American Family of Wistars and Wisters
The Descendants of John Backhouse, of Moss Side, Near Yealand Redman, Lancashire
The Descendants of Joran Kyn of New Sweden
The Dupuy Family
The Featherstones and Halls: Gleanings from Old Family Letters and Manuscripts
The Gibbins Pedigree, 1910
The Golden Wedding of Benjamin and Jane Price with Breif Family Record
The Gurneys of Earlham Vol. 1
The Gurneys of Earlham Vol. 2
The Heacock family: Jonathan and Ann Heacock and their Descendants
The Head Family, 1905
The Head Family, 1905 Supplement
The History of the Shinn Family in Europe and America
The Lancaster Family
The Mather Family of Cheltenham, Pennsylvania
The Pedigrees of Dickinson, Darby, Fowler and Rathbone
The Penns and Peningtons of the Seventeenth Century
The Quaker Janneys of Cheshire and their Progenitors
The Quaker Poets of Great Britain and Ireland
The Satterthwaite Genealogy
The Shoemaker Family
The Stephenson Brochure
The Steward Family of New Jersey
The Study of Quaker Genealogies
The Wings as Friends
The Wynnes: A Genealogical Summary of the Ancestry of the Welsh Wynnes
Thomas Coates Who Removed from England to the Province of Pennsylvania, 1683
Trustum and his Grandchildren
William Cooper of "Greenfield" Woodbury, New Jersey and his Cooper Ancestry
Wills and Administrations of the Various Backhouse Families [Ancestry.com misspells name as BLACKHOUSE]