Oxley is a believing Catholic, but except for a few slips he does not weight his book or try to convince the reader that the Shroud is authentic. I give him credit for that.
However I was not happy with the books' use of pages and the reader's time. About 110 pages are devoted to history, not only of the Shroud, but of lots of peripheral issues which the reader may not care much about. Then he spends a few dozen pages explaining how painful the crucifixion must have been. OK, that's obviously true but it adds little to the main subject.
Finally he gets to the important issues having to do with the Shroud's claimed authenticity. This section is the final 90 pages of the book. He fairly reviews the evidence and scientific investigation, of which there was plenty, but not enough to resolve the issue. The carbon dating that "proved" the Shroud to be a medieval artist's work was wrong, so it could be 2000 years old. The main problem with deciding authenticity is that no one, including dozens the dozens of scientists who have looked into the matter, has come up with a plausible mechanism for how the image was imprinted onto the Shroud. Given this crucial missing explanation, it cannot be decided whether the Shroud was made by natural or supernatural means. Oxley spends less time on all the possible imaging phenomena than does Antonacci, but covers them well.
As a hardcore skeptic and atheist, I remain open-minded about this possible miracle, and I certainly agree that the image creation is unexplained. More research is needed. He points out that the Church is less interested in the Shroud's authenticity than in its value as an object of veneration.
Finally, any skeptic or atheist who attempts to damage this relic should be imprisoned. Natural or supernatural, the Shroud is the only thing like it in the world and potentially has much to teach us. As Oxley says, the Church owes humanity the most thorough possible investigation.