The series has thirty-two books divided into six levels, beginning with Level A for beginning readers and gradually increasing in difficulty to Level F.
Level A looks at everyday happenings that could have taken place in Lehi's household to help children connect with these Book of Mormon characters.
Level B continues with stories about the everyday life of Lehi's family, allowing children to relate their own experiences to the stories.
Level C continues with commonplace events and begins incorporating scriptural ideas into the stories of Lehi's family.
Level D relates simplified versions of the scriptural stories about Lehi and his family. Each book contains scriptural references.
Level E is directly based on scriptural accounts in The Book of Mormon with direct quotes and references so children encounter scriptural verse while reading the stories.
Level F is also based on the scriptures, and is the most advanced of the Little Book levels. Fluent Level F readers should be able to read the actual Book of Mormon.