Ore in Every Rift of Livesey’s Apologia and Guide By Dewitt Henry, Literary Bookmarks Editor THE HIDDEN MACHINERY: ESSAYS ON WRITING by Margot Livesey (Tin House Books, 2017). 301pp, paper, $15.95. MFA programs are descendants of the “how to be a successful writer” handbooks in the 1890s (see “Handbooks and Workshops” in Andrew Levy’s 1993…