I have a nearly full library of most books by Kinship, I use them almost daily on both families related to the Weatherwax family, and research for my new book on the Sipperly family. Yesterday Kinship.com released a new and awsome website for their products. (I have no relationship to Kinship) The new websites allows you to search all of their titles by the family surname you are looking for. This is an awesome advantage now you can make sure a book has your family surnames in it before you buy it.!!!!
Be patient as not all of their titles have had the indexes yet placed on their website search function as yet, but Arthur is currently working on that aspect of the website and more data will be added.
If you are looking for pre 1850 NY ancestors Kinship provides the most extensive sources of Church book, vital ,and local records for many NY counties. Vist their website at: http://Kinship.com