"The unicorn from the stars (1907) is a thorough reworking of Where there is nothing (1902)"--dust jacket.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Where there is nothing ; and, The unicorn from the stars : manuscript materials by W. B. Yeats. ISBN 9780801451188. Published by Cornell University Press in 2012. Publication and catalogue information, links to buy online and reader comments.
