On Fatherhood, and Lessons for Sons By DeWitt Henry, Prose Editor Dad’s Maybe Book by Tim O’Brien (Houghton Mifflin, 2019. 382 pages, $28.00 hard cover, ISBN 978-0-618-03970-8.) Tim O’Brien is back in top form. His last novel, July, July, appeared when the author was fifty-nine. This new book, a nonfiction hybrid, is part journal about…