Complete set of Procurement Professional Study Guides, ideal for certification. - Set includes: Professional Study Guides 1, 2, 3, Skills Standards, and Management Guide - Published: July 16, 2021 (3rd Edition) - Table of Contents: Includes topics such as Management, CSR, Finance, VR, AI, and Data Processes The original price was 45,000 yen. I purchased these for certification, but I quit my job soon after and they are unused. The 4th edition seems to be the latest version now. Thank you for looking.