This week's additions to the audio files on the book page are in the section titled "Leadership":
#53. To Lead Is to Measurably Help Others Succeed.
#54. At Their Service.
#55. Have You "Hosted" Any Good Employees Lately?
#56. A Sacred Trust.
#57. Rat Psych Rules!-Or: Deploying Positive Reinforcement's Incredible Potency.
Collect them all, and when we're finished, you'll have an audio version of the entire book.