The Perennial Miss Wildthyme (anthology)

The Perennial Miss Wildthyme was a 2015 Iris Wildthyme short story anthology.

Publisher's summary
Samhain is one of those little snow-covered villages that look as if they haven't changed in the last thousand years. But Iris Wildthyme has been back to the village time and time again, and every visit brings its own unique adventures. Because there is a fancy dress shop in the heart of the village, with changing rooms that are doorways to anywhere in time and space. And one of these days, Iris is determined that she will get to the bottom of just what exactly is going on.

Or perhaps, on one of those days, she already has...