If you're not familiar with FamilySearch Family History Books, you may want to familiarize yourself with this amazing resource. Family History Books.
As my father noted yesterday, FamilySearch now has more than 100,000 family history books and collections available in this digital collection. Many Americans who have ancestry in America going back at least a few generations should be able to find resources on at least one family line: diaries, family history books, local histories, collections of letters. The collection is extensive and amazing.
One item of particular interest that FamilySearch just added is Grandma Margaret Overson's blue Jarvis-DeFriez history. My father inherited the original copyright, so he signed a copyright release, and now anyone can download all 710 pages of family stories and pictures. Here is a link to the downloadable pdf:
Overson, Margaret Godfrey Jarvis. George Jarvis And Joseph George De Friez Genealogy. Mesa, Arizona: Margaret J. Overson, 1957.Note, 9/2/13: the link doesn't seem to work. Go to the link for Family History Books and type in "Margaret Overson" to see or download the book.