Dan Jones - The Tale of the Tailor and the Three Dead Kings (2021) ENG

One winter, in the dark days of King Richard II, a tailor was riding home on the road from Gilling to Ampleforth. It was dank, wet and gloomy; he couldn't wait to get home and sit in front of a blazing fire.

Then, out of nowhere, the tailor is knocked off his horse by a raven, who then transforms into a hideous dog, his mouth writhing with its own innards. The dog issues the tailor with a warning: he must go to a priest and ask for absolution and return to the road, or else there will be consequences...