The memoirs of a Russian Orthodox monk in the last days of the Soviet Union. Truly a colorful cast of characters that shows how faith can shine even in the darkest of times.
What if the faith of others isn't a challenge to the legitimacy of your own, but an invitation for you to be a better Christian, Muslim, Buddhist, etc? In this wonderful book, Barbara Brown outlines how her faith has changed since stepping down from being an Episcopal priest to teach a world religions course.
Krister Stendahl, the former Lutheran bishop of Stockholm, Sweden performed an act of such grace to Latter-Day Saints during the dedication of the Stockholm temple. I think Latter-Day Saints could learn a lot in our approach to those from other faiths, and I would hope could also find moments of holy envy in our own lives.