/ Recommend sport autobiography
John McEnroe's book is a great read but perhaps has a few too many 'adult' themes for a 13 yr old.
Richard Moore's book 'Heroes, Villains and Velodromes: Chris Hoy and Britain's Track Cycling Revolution' gives a real insight into what it took for the GB track team to become world beaters.
I haven't read it but I flicked through it when considering it as a present for a friend and it looked to fit your criteria (I did buy it for that friend and she loved it!)
Swimming to Antarctica by Lynne Cox.
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