Knuth lives in the Kalamazoo, MI area and is an eighth-grade math teacher. Fifteen years ago, she stopped into the St Vincent de Paul thrift store, to buy a rosary, and somehow came away as a new volunteer.
At her first meeting with the others who ran the store, she suggested that she could organize the paperwork with a computer system, to use "for inventory control, paying bills, client files, and make it possible for customers to use credit cards for purchases" (She had been shocked to learn that she couldn't pay for the rosary with her credit card). The other volunteers rolled their eyes, and one octogenarian said "What we could really use is someone who would take out the trash every night and clean the bathroom."
The stories in "Thrift Store Saints" illustrate Knuth's changing perspective, as she focuses on the people who come into the store, listens to them, and learns from them about Jesus, and about serving others.