Thx . Actually most cbk / study guide are out dated. Issap, issep, csslp, cap… I think only the official study of cissp stay current. The only worry ( problem) for me is the “old” term because some NIST have been retired or updated when the guide is written. But I guess as long as your knowledge stay current, this should be fine
The CAP CBK is outdated, but you can still use this book for fundamental concepts. For the upcoming new version of the CAP exam, I'd still use the 2nd edition CBK, but I'd also check out NIST's latest pubs such as SP 800-53 Rev 5, 800-37 Rev 2, 800-137A, etc. Basically, the most fundamental NIST pubs used for references are listed at the end of each subtask of each of the RMF steps in NIST SP 800-37 Rev 2. I'd definitely glance at each of these pubs for the upcoming version of the CAP exam.