There has been data ("Citrix Certified Administrator for Citrix XenDesktop 4 Certification Exam Preparation Course in a Book for Passing the CCA Exam - The How To Pass on Your First Try Certification Study Guide") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Fri Aug 2 19:34:20 2019, so the data displayed here has been removed .