Amazon and PW have made up, apparently, or fixed the glitch that affecting listings on Amazon yesterday, when none of the books I checked had a Publishers Weekly (or Booklist, etc.) review displayed. Two people wrote today to point out books that do too have PW reviews, and indeed, checking titles just now from yesterday’s New Books page, most of them do. It looks like Amazon did some modification of the standard page format, perhaps.
Locus Online's Editorial Blog
