Mark Brown is a relatively common name, and there are likely many authors with that name across various genres. Without more specific information, it's challenging to provide a description of a particular Mark Brown. However, one notable individual is Marc Brown, an American author and illustrator of children's books, best known for creating the Arthur Adventure series, which features Arthur Read, an anthropomorphic aardvark. If you are referring to Marc Brown, he was born in 1946 in Erie, Pennsylvania, and his Arthur books have become a beloved series with numerous titles, have been adapted into an animated television series, and have won several awards. His work is recognized for its ability to address real-life childhood issues with humor and sensitivity. If you are referring to a different Mark Brown, please provide additional details for a more accurate description.