From the forum I gathered that we were not expecting an update from OG13 for next 3-4 years. Looks like OG 15 is getting ready to release in July. Is it worth waiting and buy OG 15?
Publication Date: July 8, 2014 | ISBN-10: 1118923227 | ISBN-13: 978-1118923221 | Edition: 1
Publication Date: July 8, 2014 | ISBN-10: 1118923227 | ISBN-13: 978-1118923221 | Edition: 1
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