Once upon a time, my GCD was Andy Pearson. If you've never heard of Andy, his *thing* is that when he's not rejecting my copy, he's an ultra runner. His longest race was 314 miles. At once. So for his birthday I wrote a children's book about it. And then when he left (he went to Liquid Death), I wrote the sequel. Click the cover and it will let you flip through. 
Andy's Buns Run
Andy's Buns Run 2: The Speedquel
Illustrations by Alyssa Bowman
Run. Sort of.