Home / Science & Technology / The Secret Science of Covert Inks View cart “The Secret Science of Covert Inks” has been added to your cart. The Secret Science of Covert Inks Samuel RubinPort Townsend: Loompanics Unlimited, 1987.First Edition. . Fine Condition. $45.00 AUD 1 in stock The Secret Science of Covert Inks quantity Add to cart Add to WishlistOn your Wishlist - View List Add to Wishlist SKU: 0010828 Categories: Humour, Science & Technology