The rather lovely independent publisher Snowbooks is now publishing details of sales and returns on its new(ish) Snowsales blog.
Do you want to know how many copies of each title Snowbooks sold in December? How many returns bookshops made the following month? Or which bookshops return copies of a book one day, only to reorder them again a few days later (and what the environmental and business implications of this silly shilly-shallying really are)? It's all there. Each blog post takes the form of an overview with a spreadsheet attached, which you can download and examine at your leisure
All you have to do to read all this fascinating stuff is email Emma Barnes and ask for a password, so she knows who has access to her sales information. You can find out everything you need to know here.