The 20% Factor: How to Achieve an Immediate 20% Improvement in Performance, Growth and Productivity: You. Your Life. Your Skills. Your Job. By Lancaster, Graham Books / Paperback Books ISBN: 074940776X / Publisher: Kogan Page, September 1993 Price Starting at $5.94 Free Shipping Send to a friend Add to Wishlist Below is a list of products arranged by condition. Select the quantity of the product you desire and click the "Add" button. Used - Very Good Very Good condition. A copy that may have a few cosmetic defects. May also contain a few markings such as an owner’s name, short gifter’s inscription or light stamp. $5.94 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store. Reviews Goodreads reviews for The 20% Factor: How to Achieve an Immediate 20% Improvement in Performance, Growth and Productivity: You. Your Life. Your Skills. Your Job.