The Prince Madoc Secret (Oak Grove Conspiracies) By Barrie Doyle Books / Paperback Books ISBN: 1486615880 / Publisher: Word Alive Press, February 2018 Price Starting at $13.46 Free Shipping Send to a friend Add to Wishlist Below is a list of products arranged by condition. Select the quantity of the product you desire and click the "Add" button. Collectible - Acceptable Signed Signed Copy Collectible - Acceptable. Inscribed by author on title page. Dampstained. $13.46 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store. Reviews Goodreads reviews for The Prince Madoc Secret (Oak Grove Conspiracies)