Conversation so far:
What type of work did Lillian Moller Gillbreth do?
For more than forty years, Lillian Moller Gilbreth's career combined psychology with the study of scientific management and engineering.
What other type of work did Lillian Moller Gillbreth do besides psychology, and the study of scientific management and engineering?
Lillian Moller Gilbreth included her perspectives as a wife and mother in her research, writing, and consulting work. Gilbreth became a pioneer in Industrial and organizational psychology.

Question: What type of books did she write?
Self-contained rewrite: What type of books did Lillian Moller Gillbreth write?