This was produced because these were three short tales that I felt deserved to be told, but did not quite fit into the scope of the books to either side, particularly given that book 7 is lining up to be rather longer than all the others already. It was very much an 'if you want the full picture' story rather than a must read, which is partially why it was released wthout a number. It has received mostly positive feedback.
As for the price, it was released at the lowest price I could manage. To give you an idea of the royalties for this, I need to sell near forty copies to buy a pint. If I could have done it cheaper I would have. I try to keep all my release costs as low as I feasibly can.
However, I certainly don't like to think of anyone feeling cheated with it, so if you email me through my website (www.sjaturney.co.uk) I will paypal you a refund straight away. Have a good weekend.