Is it expensive to buy a book from www.amazon.com? It doesn't mean that you cannot get or have the book it right now. You can contact the writer directly. Here you can contact the writer through her email: firstname.lastname@example.org
Then you will get the special price or you want to get the e-book through the writer, you can email the writer too, to get the e-book. So, what are you waiting for now?
If you are in Indonesian, you can contact the writer to get the special price at 081314631851