Final answer:
The specific founder the student asked about is not mentioned in the provided information. The references provided do include prominent figures such as Mary Church Terrell and Booker T. Washington, but they do not match the description in the question.
Step-by-step explanation:
The founder who was an author of 17 books, owned an advertising agency, and served as the first National President and AOII Historian for life is not explicitly mentioned in the provided information. However, based on the context of the historical figures mentioned, it is possible that the student may be referring to a founder within the realm of significant educational and social activists of the early twentieth century. Without the specific name or organization to which the question refers, we cannot accurately identify this individual. We do have information on other prominent figures such as Mary Church Terrell, who was a notable activist and the first president of the National Association of Colored Women's Clubs, and Booker T. Washington, who founded and presided over Tuskegee Institute.