Seven years after it was published, The Husband Project: 21 Days of Loving Your Man on Purpose and With A Plan by Kathi Lipp took #3 on PW’s Religion Nonfiction bestsellers list for June. Sales for the guide to improving your marriage were driven by Lipp’s online Bible Study, The Husband Project, taking place from June 20 to July 22 through Proverbs 31—the women’s ministry led by author Lysa TerKeurst. Lipp’s book encourages women to make their marriages a priority with simple daily action plans, and the online bible study based on it is the largest Proverbs 31 has held to date, with participants totaling over 47,000.

At #5 on the Religion Nonfiction list, the 2015 edition of C.S. Lewis’ Mere Christianity enjoyed a sales boost through in-store promotions according to publisher HarperOne. Originally published in 1952, Mere Christianity is comprised of a series of BBC radio talks by the Chronicles of Narnia author about the fundamental teachings of Christianity.

The Journey Within, Bhakti Yoga practitioner and spiritual teacher Radhanath Swami’s follow-up to 2010’s The Journey Home, took #6 on the Religion Nonfiction list. The book draws on Western religions and ideologies to show how all people are united. Mandala Publishing conducted a major national publicity campaign for the title, including interviews on radio, podcasts, print, and online media; a U.S. tour; Facebook promotions; and ads on, Amazon, Facebook, and more. The Journey Within has sold 24,000 print copies since its publication in May, according to Nielsen BookScan.

For the second consecutive month, the paperback edition of Jan Karon’s Come Rain or Come Shine topped PW’s Religion Fiction bestsellers list. The fourth and newest book in Wanda Brunstetter’s Amish Millionaire series, The Missing Will, followed at #2.