It is no secret I'm a fan of the Rivers of London series and one of the things I like is the multiple ways in which the story is told, e.g. here the graphic novel. Like its predecessors it is good in keeping you entertained while waiting for the next novel in the series.
Cry Fox only contained four issues so it was a very fast read. It was a take on a very well known tale which was maybe not the most surprising or original but the nice cast of characters make up a lot. As one of the characters plays a role in the sixth book, The Hanging Tree, it is best read after it. At the end there is some more information about the Fox in several cultural and literary settings.