I was given this book as I am a keen, if limited, cyclist. I am perhaps being a touch pedantic as a consequence, but this strikes me as a poorly researched book, or one which discards any pretence at realism to spice up the story. And given that it is overwhelmingly about cyclists and cycling, that is a slihtly surprising approach.
The most annoying invention is the idea that one person can be an olympic champion at both the pursuit (which lasts longer than 4 minutes...more than the 1500m) and the matched sprint(where, tactics aside, the result is typically determined by raw speed over a distance covered in a little over 10 seconds). In athletics it would be like Usain Bolt winning the 1500m or Kelly Holmes winning the 100m....something that will never happen. There are plenty more glaring errors (nonsense race formats, phantom velodromes, cyclists preparing and training in ways they wouldn't dream of doing) but I perhaps shouldn't bore you with them. Factor in the pen-portrait characters of Jack - Chris Hoy (charismatic, nice, scottish, supremely gifted and confident without ever seeming arrogant), Kate - Victoria Pendleton (slight for a sprinter, racked by self doubt) and Zoe - Rebecca Romero (ferociously self assured and with an absolute determination to win) and the story resembles fan fiction. Entertaining, but with ciphers as characters, badly researched, and a bit lightweight as a result.
I won't say you won't enjoy it a bit, but don't expect any more than an airport novel.
If you want something better, might I suggest the following:
For a novel about cycling, read The Rider
or Bad to the Bone (Original Fiction in Paperback)
. If you want to read a true story about a cyclist dealing with the themes of illness explored in the book then read The Escape Artist: Life from the Saddle
. It is an absolutely wonderful book. If you want to find out more about the wonderful sport of track cycling from a human perspective read Chris Hoy: The Autobiography
or the less well known Heroes, Villains and Velodromes: Chris Hoy and Britain's Track Cycling Revolution