Frank Bunker Gilbreth Jr. was an American author and engineer, born on March 7, 1911. He is best known for co-authoring the book “Cheaper by the Dozen” with his sister, Ernestine Gilbreth Carey. The book humorously recounts the experiences of growing up in a large family, highlighting the unique parenting methods of their father, Frank Bunker Gilbreth Sr., an early pioneer in time and motion study. Gilbreth Jr. followed in his father's footsteps by pursuing a career in engineering and management. He contributed to the field of industrial engineering and was involved in various projects that aimed to improve efficiency in the workplace. His work, along with his family's experiences, has had a lasting impact on both literature and engineering practices.