Use this code GM3DL5XL to get 25% off unlimited copies of The Quality of Effort and The Quality of Effort Workbook through June 30, 2016.

The code is valid only at the book manufacturer’s site, and not on Amazon. Both books are available in print and Kindle editions on Amazon as well.

Kristofferson, who was a Rhodes Scholar, Golden Gloves boxer and a college football and rugby player, was born on June 22, 1936.