50 Classics is a 11-book series with 11 primary works first released in 2003 with contributions by Tom Butler-Bowdon, Angela Duckworth, Gary Keller, Cheryl Richardson, Brian Tracy, Anthony Robbins, Robert G. Allen, Guy Kawasaki, Jerrold Mundis, Marsha Sinetar, Tom Butler Bowdon, Paul Krugman, and Stephen J. Dubner.
2006 • 4 Readers • 312 pages • 4
2017 • 4 Readers • 386 pages • 4
2008 • 1 Reader
2004 • 1 Reader
2006 • 1 Reader • 456 pages
2017 • 1 Reader