Jack Greenberg adopted William Cole and his sister Suzanne shortly after marrying their widowed mother. Cole traveled widely with his parents, even accompanying them on some of their human rights missions abroad. Just as important, he served as the family's unofficial archivist, saving clippings, and memorabilia that might otherwise have been lost. He currently lives with his two sons in Sitges, a sunny Catalan town about thirty minutes down the coast from Barcelona. He is an art and rare book dealer and an expert in connoisseurship. His most recent book is The Juvenilia of William Kentridge: An Unauthorized Catalogue Raisonne(Sitges, 2016