This is a cute story, but it seems like the author did no actual gymnastics research. Moves are described that don’t exist or are never referred to as such, in ways that make no sense. And the “notoriously hard” and risky dismount invented by the coach character is just a double twist off the beam, which is common as mud and something that young gymnasts with zero elite aspirations are doing with no problem.
(For example—a double-front handspring layout? Is that two front handsprings and a front layout? If so, why has the allegedly very talented MC never done this when those are all very elementary skills, and why is it portrayed as the only way to get high enough in the air when back handsprings give you exponentially more momentum? On the uneven bars, a “backwards straddle roll” from reverse grip, which is mentioned repeatedly, is not a move that exists. The closest thing I can think of is a Jaeger, which is a single-bar release, not a transition to the low bar, and functions nothing like described. Why is the main character's back walkover on the beam given such focus when this is taught to young kids at beginner levels, and immediately abandoned once they learn harder skills? And so on.)
The mystery storyline is nicely done, but the obvious gymnastics errors take you out of the story. My younger sister, a twelve-year-old gymnast whom I planned to gift this to, said they made her laugh, so at least it doesn't fully diminish the reading experience?
I respect that the author was an actual Olympian, but in my opinion if you’re going to write a novel about about gymnastics, you should actually research gymnastics! I learned more about gymnastics (before my sister started the sport) from watching the Olympics and doing some casual reading of forums than is evident in this entire book.