Being a Spaniard, I had never known of the Oviedo sudarium until very recently. Looking for books on the matter, I found this piece here in Amazon and decided to purchase it.
I can say that it is a vivid and detailed account of the history of this cloth and how it has survived to our time, with a documented history that goes back until way before the Middle Ages and in custody in Oviedo for over a thousand years, and yet mostly unknown to the Spanish people. Its mere existence, its material, marks, biological and microscopical contents, and the forensic studies explained and depicted in the book call for a careful reconsideration of the authenticity of the shroud in Torino.
I completely recommend this book about the most astonishing relic in Oviedo. Bennett's work is captivating and enjoyable... well, if you are ready to read about a most horrible death.
Bennett summarises the challenge every person has to face in relation to this cloth: everything on and around the relic, as well as its nature and contents, scream that it is authentic. If we, the conspiracy-addicted modern people, try to find alternative explanations of the origin of the cloth, it is just because of our difficulty to believe.
Are you able to believe? Read the book and ask yourself.