Zaro founded the Metro Theater Company (Circus) and for over 10 years was its artistic director, writer-in-residence, and a member of the performing ensemble. She has been collecting antique American quilts for over 40 years and has written two books about the history of American women and quilting. Living in London for many years, she founded the publishing company MQ Publications, which grew from publishing a few books on quilts to a wide range of non-fiction titles which sold throughout the world.
Zaro has written a book of children's poetry, Mud, Moon and Me, published by Orchard Books in the UK and Houghton Mifflin in the USA. Her poetry for children has appeared in many anthologies.