NM Dan Heisman is the author of 12 chess books (The Improving Chess Thinker, A Guide to Chess Improvement, Back to Basics: Tactics, The World's Most Instructive Amateur Game Book...). He was a Chess.FM host (Ask the Renaissance Man), Chess.com TV Host (Q&A with Coach Heisman) & wrote the Chess Cafe Novice Nook column for 12 yrs, winning Best Instruction in North America 7 times. NM Heisman was the 1973 Gr. Philadelphia Chess Champion & played on the US Team Champions (Penn State) in 1971 with Donald Byrne. He has a Youtube channel, Chess Tip of the Day on Twitter & Howard Stern was a student.