I bought "Champions Vol 5" by Ernst Nebel - very good book and i'm told the other volumes are equally as good. Can't remember what i paid for it but it was worth it anyway. Geoff Cooper is in this one too and others like Koopman, Roger Florizoone, Kipp & Son, Verkerk, Mike Ganus etc, etc. 25 fanciers in total with detailed accounts of feeding systems, training, breeding etc.
Any excellant reference book to pick a system to follow that suits your needs. There should be something for everyone in this book. I should probably read it again and stop with all the choppin and changin! :-/