The book is available from the author, who lives in Victor, New York. It may also be helpful for you to look at census data from the era you think your family was up in that country. That ought to be available in Boston somewhere. It's organized by county and then town. Friendship is in Alleghany County, New York, where there were plenty of Lonsberrys. (My family was from West Almond) Check Friendship and other county towns. You may also want to look at the town of Pultney in Steuben County. Good luck.