Chapter 7 - Best: 38 SecMonths later, he finally bought the used bike. One afternoon at the park, Miles stopped to fix a younger kid's fallen chain.

"What do I owe you?" the boy's father asked.
Miles hesitated. "Help somebody when they're stuck."
Then he climbed back onto his bike. "Mom! Time me!"
I unfolded the old bus map. On the back, Miles had drawn the bike trail and written: BEST: 38 SEC.
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I raised my phone. "Go!"
And my son kept riding.