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This Shepherd's Notes: John on Amazon has does have sample pages (go to the page and click on the image of the cover that has "Look Inside" written just above it).
Be sure to look at the preview for the Paperback version, as it allows you to see more than the Kindle one. It doesn't give you too much to look at; it only goes through pages 14, and most of those pages are introductory material and of little help, but we do still have pages 11-14 to give you an indication of its style.