None of the Above
Q. A book endorsement was given by a bishop who has since been elevated to cardinal. The book will soon be reprinted (second edition). Should the endorsement printed on the back cover change to reflect his new title? Or should it remain as it was at the time the endorsement was given?
A. This is more of a marketing issue than editorial, and CMOS is silent on the subject. I believe marketing practice is to quietly update affiliations, since fancier titles are more impressive. If the statement is long out of date or very controversial, however, consider whether you might misrepresent the opinion of the blurber, in which case using the old affiliation (or a renewed statement from the blurber) would better represent the truth.