The story
American Book Company was founded in 1996 by Dr. Frank Pintozzi, a professor of reading and English as a Second Language at Kennesaw State University, and Colleen Pintozzi, a math teacher and supervisor of General Educational Development programs.
They began writing textbooks for nearby South Carolina. After finding success, they created more books for states across the country.
From Wikipedia’s article on American Book Company (1996), shared under CC BY-SA 4.0.4