This book is easily the best book out there for learning the abacus, especially for people with no previous abacus experience. It is so clear that it is not just for adults but young kids can use it. There are lots of examples all beautifully illustrated with easy to understand diagrams. The book has complete step-by-step instructions, starting with some easy examples and then moving on to more difficult ones. It didn't take me and the kids long to start using the abacus and we enjoyed every minute of it. I am also going to get the smaller pocket sized edition to read on the train on the way to work.
I definitely recommend it.