Author:  Cooper, Susan 
Interest age: from c 9 years
Published on 14 November 2019 by Penguin Random House Children's UK (Puffin) in the United Kingdom as part of 'the A Puffin Book' series.

Paperback | 208 pages
129 x 198 x 17 | 152g
In their desperate quest to find the grail, stolen by the forces of the Dark, the Drew children have returned to Trewissick. One night, in a strange ceremony, Jane watches the village women construct the Greenwitch: an ancient offering to the sea. Overcome by the Greenwitch's power, Jane makes a perilous wish - one that will tip the balance in the ongoing struggle between good and evil.
The third haunting, magical book in the highly acclaimed Dark is Rising sequence.