I recall reading this book as a seven-year-old, having bought it from a Puffin Club that ran in our school.
It is hard after so many years to really describe the book, but whoever reads it now could feel a little of what is now another world. The children run a junior supporters' club for their local football team. They deal and engage with the chairman, manager and players alike.
The interesting thing would be to know what a seven-year-old of today thought of it.