Water Weed is a standalone in the Peter Grant series. The graphic novels are good because they show a visual side of the Folly and the characters involved that help you fill in your mental model when reading the novels. Water Weed is no different.

A standalone piece about a crossover with the mundane drug trade and some magic. The water Weed is distributed by boat, coming to Peter's attention because Beverley's younger siblings have extorted some from the hapless delivery boys on their boat in the Thames.

There's an interesting light on the methods used to hide tracks, and also on the effects of werelights on plants. It also breaks a few stereotypes and sets up a previous character and a new one for yet another story.

Definitely worth reading Water Weed if you are a fan of the Peter Grant stories.