The Chartered Institute of Procurement and Supply is no longer selling CIPS / Profex textboooks for the 2013 (current) range of qualifications. Textbooks can be obtained from Profex Publishing Ltd www.profex.co.uk
These textbooks have the same content as the earlier CIPS / Profex textbooks for the 2013 qualifications. Profex usually offers a next day delivery service if your books are ordered before lunchtime.
CIPS (and Profex) will be selling textbooks for the new (2018) qualifications in due course.