Donald J. Sobol was an American author best known for his popular children's book series, Encyclopedia Brown. Born on January 4, 1924, in New York City, he began his writing career as a journalist before transitioning to children's literature. His first Encyclopedia Brown book was published in 1963, featuring a young boy detective who solves mysteries in his hometown. Sobol wrote over 25 books in the Encyclopedia Brown series, captivating young readers with engaging stories and clever puzzles. His work has been praised for encouraging critical thinking and problem-solving skills among children. Donald J. Sobol passed away on July 29, 2019, leaving a lasting legacy in children's literature.