We are currently working on a couple of genealogy books at the moment. The challenge with these books is always to find what's compelling in the sometimes dry "names and dates" nature of the research data and build on it, adding historical background information and photos to make the story come alive. If you are considering creating a book from genealogical information, you might find these posts helpful.
How Do You Write a Story That's Not Yours? Telling the Stories of Your Ancestors
A "Story Genealogy" Book- By the Numbers (Part One)
A "Story Genealogy" Book- By the Numbers (Part Two)
Book Highlight: A Triumphant Family History
You can also see some samples of ancestral histories here.