Have a look on ebay for this one.
Hydroponics On Rockwool
[hydro-book] £11.95
Hydroponics On Rockwool
A step by step guide to building a hydro grow room, this book deals with all aspects, not just those relating to rockwool. Clearly laid out with plenty of colour diagrams and photographs, this book is very easy to read and excellent value for a hardback. It's our best selling hydroponics book. By Gregory Irving
Hydroponics On Rockwool
Thanks fellas!!