To deal with her feelings, she began keeping a journal. Unable to find books with a personal perspective on widowhood, she realized that her own reflections could speak to the thousands of women like her, each one with very different yet very similar day-to-day experiences. It Must Have Been Moonglow chronicles the emotional roller coaster of Greene's experience in a collection of brief essays, like diary entries, that capture the sadness, the humor, and the triumphs that all widows encounter.

"Your heart may feel like stone, but your mind needs to keep going", she says, adding, "Just as I take Pravachol for my cholesterol, I try to keep a supply of optimism and a good perspective nearby, plus a backup of as much sense of humor as I can muster". She writes with wit and insight about the logistics of an evening out with a group of single, older women, none of whom drives very well; about handling the check when going to dinner with a couple; about shopping for one; about the miracle of friendships on the Internet; and about the blessings of family.

In It Must Have Been Moonglow, Phyllis Greene has written an intimate, candid, and engaging book, not about grief but about inspiration and strength.