Re: The Sharpless Genealogy book
Ancestry.com has this book. If you have an account you can view the whole book. It's obviously slower than owning a copy but a lot cheaper.
As for marriages between Sharples(s) and the Chance family, here are all the people with the surname "Chance" or "Peters".
Martha Helen Hastings
William Ellis Hicks
So the first list of people all have the surname Chance and the second are all surnamed Peters.
Hope this helped,