In her first book, One by One, which came out in 2017, Dalfonzo wrote about single people in the church. The topic was very important to her, and she worked on it for several years. She says, “I wanted to get that experience out there and tell other Christians about it and help other Christians navigate being single in the church. I also wanted to help the church as a whole know we’re out there, these are the kinds of things we’re going through, and we need you to listen and try to understand, and work with us.”