10 Interesting Facts About Your Own Mind that You Probably Don’t Know (Ivan Harmon’s series) by Ivan Harmon http://www.soundslikeangus.com/wp-content/uploads/2017/09/TIF-12-Retail-Sample.mp3 View on Audible.com
Boost Your Brain Power: Learn Better, Smarter, and Faster – Scientifically Proven Guides to Sharpen Your Focus and Retrain Your Brain by Ivan Harmon http://www.soundslikeangus.com/wp-content/uploads/2017/09/BBP-Retail-Sample.mp3 View on Audible.com
10 Fun Facts About Your Memory: How Does Your Memory Work (Ivan Harmon’s series) by Ivan Harmon http://www.soundslikeangus.com/wp-content/uploads/2017/09/TFF-13-Retail-Sample.mp3 View on Audible.com