I've been studying with Bob Tait 'Recreational Aircraft BAK for Ra-aus' book. I started with Dyson Holland and I just couldn't get into it. I ended up purchasing Bob Tait e-text book online which I could start reading instantly from laptop/ipad and found it way better for my learning. Still yet to sit my test so will see how it goes but i've heard from many that you can't go wrong with any of Bob Taits books.