|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon UK||4 days ago||50.31||$23.72||You save $26.59|
|Amazon US||4 days ago||31.27||$23.72||You save $7.55|
|Book Depository US||yesterday||26.11||$23.72||You save $2.39|
Matt Fitzgerald is a prolific health and fitness journalist and author of 12 published and forthcoming books on fitness, nutrition, and weight loss, including Brain Training for Runners and Performance Nutrition for Runners. Fitzgerald is also a featured coach with the online training group Training Peaks, where he creates interactive training plans for runners and triathletes.