Kim Smith began her writing career as co-author of the bestselling weight loss memoir 'Unbelievable Freedom: How We Transformed Our Health & Happiness With Intermittent Fasting' published in 2018. This work highlights her journey and insights into health and wellness through the lens of intermittent fasting. However, her narrative extends beyond physical transformation; it encompasses a profound spiritual journey inspired by her late grandmother's words, 'Enjoy Your Life.' This phrase became the foundation for her book 'Enjoy Your Life: Pursuing My Grandmother’s Three Word Legacy.'

In addition to her memoir, Kim is the founder of Unbelievable Freedom Books, which aims to share messages of empowerment and freedom with readers. Her bibliography includes several titles that focus on personal development, habit formation, and the pursuit of happiness, such as 'Fasting, Feasting, Freedom: A 33-Day Habit Creation Guide' and 'Unmired: Transforming Struggle Into Serenity.' Through her writing, Kim Smith encourages individuals to embrace their journeys and find joy in their lives.