Reviewed by Jon M. SweeneyHarper One, 512pp, £18.99Tablet bookshop price £17.10             Tel 01420 592974As the subtitle suggests, the new book by James Martin, author of The Jesuit Guide to (Almost) Everything is as much about the author and reader as it is about Jesus. We are taken us on a journey to find and experience the historical Jesus, walking in Christ’s footsteps through the Holy Land, using biblical scholarship to answer twenty-first-century questions. This is not yet another study of “the historical Jesus”, but a book born in and for the Church, as well as a deeply personal story. “Jesus Christ is fully human and fully divine,” Martin begins, and never does he steer into my