One of Maine’s oldest churches, founded in Portland in 1674, is Unitarian. Seventeen of Maine’s governors were Universalists or Unitarians. And the imprint of our two parent traditions is all over the state. For the past fifty years, the Rev. Peter Tufts Richardson, who has served a number of UU congregations, has studied religion and its adaptation to the post-industrial world—and at 686 pages, his latest book, Universalists & Unitarians of Maine: A Comprehensive History (Red Barn Publishing, 2017; $69.95), is a definitive compilation of the denomination’s two branches in the Pine Tree State. An excellent resource for historians, it captures stories from more than 400 congregations and includes 435 photos and illustrations.