The Crow Biddy by Gillian White
Molly Tarrent, middle-aged, newly divorced and very overweight, is living alone and brooding obsessively about her ex-husband Crispin and his new wife Rose, when a chance meeting with an old school chum, Erica Chorley, turns her life upside down. Long ago the two girls belonged to a witch band led by Erica, using drugs, magic and their adolescent dreams to get high, their days were spent in the classroom, their nights in the chapel practising dark, unholy ritesAnd Molly was a key accomplice in the persecution of innocent Amy Macey,a schoolfellow who vanished mysteriously and whose body was never found. Now , however,it seems that the past may be coming - horribly - back to life...