I bought this book to learn about GRP moulding and laminating for model aircraft construction - well, yes it answered all my questions - and then some. This book is really a pocket reference for anybody who works with any type of GRP including Kevlar and carbon fibre.
It starts with a brief history lesson and then leaps into the different materials, their pros & cons, how to work with them in many ways, how to mould, laminate, repair - anything from models to full sized cars, yachts, furniture, fish ponds and more.
The text is simple but thorough and works from the lowest common denominator = total inexperience. This book is both pragmatic and theoretical. If you want technical specifications you will find that too.
If this book doesn't cover something about GRP then I probably don't need to know. I hope that recommendation works for you, too.