Book - Invasive Hats by Janet Velvin and Kate Jordan.

Invasive Hats and how to knit them is a collection of eight hat knitting patterns inspired by weeds. From blackberry and thistles to agapanthus and fennel, weeds of all description feature in colourwork or lace.
Each knitting pattern has a small essay about the history of the W**d and the detrimental impact it has on our native ecosystems.
Knitting patterns by Janet Velvin and text by Kate Jordan