After purchasing trouble shooting riding manuals I felt underwhelmed and to be quite frank ripped off.
I wasn't born in the saddle but I'm an adult advanced standard rider who has been riding (pretty obsessively) for 6 years.
For me this book has it all. It's information is delivered in a high level and comprehensive manner and is invaluable whether you're into jumping, flat work or cross country. What I loved about this book is that it armed me with questions to fire at my instructor and it compounded learning from my riding lessons.