Start with high-confidence single parenting books, then narrow by subgenre or adjacent topics.
Good Inside
Becky Kennedy
Sacred Parenting
Gary Thomas, Gary L. Thomas
Raising Passionate Jesus Followers
Phil Comer, Diane Comer
Doing Life With Your Adult Children
Jim Burns Ph.D, Jim Burns
Parenting
Andy Stanley, Sandra Stanley
Boy Mom
Monica Swanson, Wendy Speake
You'll Make It (and They Will Too)
Amy Betters-Midtvedt
Be the Dad She Needs You to Be
Kevin Leman, Stu Gray
M Is for Mama
Abbie Halberstadt
Mothering Boys
Molly DeFrank
Paul David Tripp
Essential Retirement Planning for Solo Agers: a Retirement and Aging Roadmap for Single and Childless Adults
Sara Geber, Harry "Rick" Moody,
Motherhood
Lisa Marchiano
Hannah's Children
Catherine Pakaluk