Claim: Louis Sachar did not finish his studies, and worked on a children's book.
Evidence: Sachar graduated from UC Berkeley in 1976 with a degree in Economics, and began working on Sideways Stories From Wayside School, a children's book set at an elementary school with supernatural elements. Sachar graduated from University of California, Hastings College of the Law in 1980 and did part-time legal work while continuing to write children's books. 
University of California, Berkeley
Hastings College of the Law Sachar graduated from UC Berkeley in 1976 with a degree in Economics, and began working on Sideways Stories From Wayside School, a children's book set at an elementary school with supernatural elements.