OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
/|/|/|/|/|/|/|/|/|/|/|/|/|/|/|/| a user's manual by Haroon Mirza. ISBN 9780957449008. Published by Spike Island in 2013. Publication and catalogue information, links to buy online and reader comments.