Questions
Frequently asked.
Short answers about the books, the bundle, and the Lighthouse companion app.
Last updated: July 6, 2026
What is TandemLights?
Two complete companion books — his account and her field guide — plus Lighthouse, a companion app for daily practice after reading.
Do the books need to be read together?
No. Each book stands complete on its own. Read together, they reveal the fuller picture of the same season.
Which book should I read first?
Either. Most readers start with the voice closest to their own experience, then read the other side.
Is the app required?
No. Lighthouse is an optional next step for readers who want a daily practice after the books.
Who are the books for?
Keep the Light On speaks most directly to husbands. Women of a Certain Age speaks to women in the middle decades of marriage. Together, the system serves both partners.
Is this for couples or individual readers?
Both. Many readers start alone and read the companion book later.
Can one partner read alone?
Yes. Each book is written to stand completely on its own.