The Smallest Dragonboy is a short story by Anne McCaffrey in the Dragonriders of Pern universe. It is truly a very short story, there isn't a lot that happens, but it is a heartwarming story of Keevan, who wishes to be a dragonrider.
Reading this short story isn't integral to any of the plotting in the Pern series. The only thing that you would need to know if you wanted to skip this, is that dragons don't always pick a rider if no one is suitable.
It was nice to read something that was character driven, and shows McCaffrey had been improving since the original Dragonflight. I hope Keevan comes up again later on in the series.