Need some help please:

I am hoping someone can direct me to either a person or a source of information on Old Town or New Troy in 1870 -1910.

There is family new to the area in 1870 that I am trying to rule in or out as the parent and siblings of my great-grandfather.
Someone was kind enough to give me marriage information from a book by a a Mr. Paulk.
I believe the title is: Early Marriages of Lafayette Co., Fl., but I'm not sure.
The information I received was: a James R. Cooper married a MaryEtta Gillett 7 Apr 1875 in Lafayette Co., FL

1. Could you please tell me how to locate a copy of this book?

2. Where to find other sources of information on people living in Old Town or New Troy at this time.

3. What cemeteries are in or around those two cities. I can find no record of a burial for a Robert Cooper who died there in 1893 or his widow Nancy Cooper; who is living next door to E. L. Cottrell in 1900 with her daughter and son-in-law:
Allan and India Anderson.
E.L.Cottrell signed an affidavit for her for a CSA Widows Pension in 1909.
4. Roberts' 14 y/o daughter Sarah "Sallie" married 31 y/o J?Jonathan Cribbs
about 1875.
5. (2) Cooper families in the area at same time, both have sons James R.Cooper born abt same time (1852-1855).
I need to place my great-grandfather with the right family.

Thank You In Advance For Your Help

Sheryl Cooper Hicks
Any help; any suggestions really appreciated.