There has been data ("SAS Certified Base Programmer for SAS 9 Certification Exam Preparation Course in a Book for Passing the SAS Certified Base Programmer for SAS 9 Exam - ... 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 19:32:22 2019, so the data displayed here has been removed .