It’s a specialist book so it’s not going to be a big seller, but when it runs out of stock then there is no way it can gain a decent sales ranking, and so it won’t catch attention and then it won’t sell much. It’s a catch-22 for new authors (new brands), distributors won’t stock much unless they see it selling lots, but it can’t sell lots unless it is well-stocked.
A lesson for me in book marketing. The next book will be so much easier.
PS Though of course I’m actually oddly pleased that it sold-out – it feels good even if it isn’t.