While coping with these difficult episodes, Cosby took on new professional challenges. He started a series of children's picture books featuring a character named Little Bill in 1997, which also became a children's TV program. A frequent speaker at commencement ceremonies, Cosby shared his advice in 1999's Congratulations! Now What?: A Book for Graduates. He took a serious look at the education system in 2000's American Schools: The $100 Billion Challenge, and paired up with his daughter Erika for 2003's Friends of a Feather: One of Life's Little Fables.