A young brother and sister can’t understand why their grandfather prays all the time, instead of telling them exciting stories about his past. When he finally explains his habits, they hear Grandpa Sam’s riveting tale, of the poverty and discrimination that forced him to leave his family and Poland, of emigrating to the US to find a new life, of scarce jobs, and of his decision to gamble for a living. He bought a home and raised a family, doing well until the day his wife became ill. The fear of losing her prompted his last bet—with God, to save his wife’s life—to trade in gambling for a life of prayer. Michelson’s story is both personal and universal, highlighting the discovery of family histories and hidden lives in people who are so much a part of every day. Moser’s skilled sepia illustrations add an intimate touch to this poignant tale. (Picture book. 7-10)