"Mr. Salinger instructed his estate to publish at least five additional books — some of them entirely new, some extending past work — in a sequence that he intended to begin as early as 2015..."

One collection, to be called “The Family Glass,” would add five new stories to an assembly of previously published stories about the fictional Glass family, which figured in Mr. Salinger’s “Franny and Zooey” and elsewhere, according to the claims, which surfaced in interviews and previews of the documentary and book last week.

Another would include a retooled version of a publicly known but unpublished tale, “The Last and Best of the Peter Pans,” which is to be collected with new stories and existing work about the fictional Caulfields, including “Catcher in the Rye.”