Coover started doing needlepoint while she was living in London in the 1970s. Her work has been described as have a "dense, swirling image-packed style." She has made over 100 needlepointed works. She first exhibited her work at the Portal Gallery in London in 1979. She says her goal with her work is to "transcend the limitations of traditional needlework by opening every possibility between the thread and the canvas." She cites Hieronymus Bosch and William Blake as influences. Her work appeared on the cover of Robert Coover's first short story collection, Pricksongs & Descants. Her work "Penelope" won Diana Grossman Award for Best of Show at the Eleventh Biennial Exhibition of the Embroiderers' Guild of America in 1984.