I’ve recently read Mr. McCrone’s book, "Judgement Day for the Shroud of Turin". Currently I’m reading "The Blood and the Shroud : new evidence that the world’s most sacred relic is real" which is exhaustive to say the least. The former book is strident and not much fun to read. The latter has some humor and personality, it’s fun and a bit like a detective story. Not much of a criteria I guess, for judging truth, but "what is truth?"