The University of Michigan has over 12,000 books on-line that make up their Making of America web site. This is a selected of Florida material only, but the MOA site deals with the whole US.
Some of my favorites
Camp Life in Florida by Charles Hallock (selected chapters on this site)
A winter in Florida by Ledyard Bill
A winter from home by Charles A. Clinton
Through some eventful years by Susan (Bradford) Eppes
Florida: its scenery, climate, and history by Sidney Lanier
Sample frequency search for Florida (occuring 25 times or more)
Books (with active links)
Journal articles (with active links)