Treasure in a Field: The Life of Venerable Mother St. Joseph is a biography by Sister Mary Fidelis McManama, published in 1960, focusing on the life and spiritual journey of the co-founder of the Sisters of Notre Dame de Namur, highlighting her dedication to God, service, and deep faith, much like finding hidden spiritual riches (a "treasure") in everyday life through prayer and action. It serves as a spiritual resource, offering inspiration from her life for those seeking to grow in faith, much like earlier works on St. Joseph that explored his interior life and service to the Holy Family. In essence, the book is about a life lived for God, finding profound spiritual wealth through humble service and contemplation, mirroring the idea of discovering a great treasure buried in a field.