Reviewed by Lynn RobertsASHGATE, 186pp, £19.99Tablet bookshop price £18                    Tel 01420 592974 This is an infuriating book. Its subject is fascinating: the revelation of how many artists have produced work on Christian subjects during the last 100 years is (even to an art historian) both surprising and hopeful. It covers an eclectic range of painters, sculptors, designers of stained glass and engravers; the output of these diverse artists is a treasure-house of images ranging from figurative to abstract in style, via symbolist, expressionist and surrealist.Richard Harries, former Bishop of Oxford, has performed a major task in collecting, researching and – with ma