Tim Muldoon is a theologian and the author and editor of several books on Ignatian spirituality, marriage, and family. He is the coauthor, with his wife, Sue, of Six Sacred Rules for Families and participated in the video production of Joined by Grace, the new marriage preparation program from Ave Maria Press. A professor for many years, Muldoon has taught at Mount Aloysius College and Boston College, and lectures and speaks frequently at colleges, universities, schools, parishes, dioceses, and retreat centers in the United States, Canada, and Europe.