"Two sisters, one stubbornly cheerful (Beatrice) and one relentlessly grumpy (Magnolia), live in a drafty old house with a family of helpful spiders. When Beatrice is gifted magic yarn from a giant forest spider obsessed with sustainability named Bog Myrtle, she and the spiders set to work knitting up a perfectly warm sweater. But greedy Magnolia sees only the opportunity for profit, and quickly converts the old house into a magic sweater factory. The exhausted spiders are driven to strike, and Bog Myrtle is not pleased..."-- Provided by publisher.