In Marian Gems: Daily Wisdom on Our Lady, Fr. Donald Calloway, MIC, shares quotes on Mary that he began collecting when he was a seminarian. He includes a gem for each day of the year, drawn from the writings of the Popes, Saints, Blesseds, and Venerables. When these gems first appeared in his book Under the Mantle, many readers loved them and suggested he publish them in a separate book for daily prayer. He was delighted and took their advice.