Pdf attachment no iBooks "Open As"

User has an iPad Air 2 running iOS 8.2 and has received a pdf as an attachment. He goes to "Open As" to open and save the pdf in iBooks but iBooks is not in the listing. Looking in the "More" shows a total of 3 items not 10, and iBooks is not listed there. How do we add iBooks to the Activities listing? We have backed up his old iPad and restored to the newer iPad, and sync. It simply is not listed as a choice...

John