The "Official Compendium of Snark Brooke and Mitchell, Duncan Lundy" is a book written in English by authors Lundy, Brooke and Mitchell, Duncan. It likely contains a collection of witty and sarcastic commentary on various topics related to Snark. This official compendium serves as a guide or reference for fans of the Snark brand, providing a curated selection of humorous and insightful content from the renowned duo.