The identities of the bureau’s experts have not been made public, Ms. Billingsley said, but they include chaplains and scholars in seminaries and at the American Academy of Religion. Academy staff members said their organization had met with prison chaplains in the past but was not consulted on this effort, though it is possible that scholars who are academy members were involved.

The bureau has not provided additional money to prisons to buy the books on the lists, so in some prisons, after the shelves were cleared of books not on the lists, few remained.

A chaplain who has worked more than 15 years in the prison system, who spoke on condition of anonymity because he is a bureau employee, said: “At some of the penitentiaries, guys have been studying and reading for 20 years, and now they are told that this material doesn’t meet some kind of criteria. It doesn’t make sense to them. They’re asking, ‘Why are our tapes being taken, why our books being taken?’ ”

Of the lists, he said, “Many of the chaplains I’ve spoken to say these are not the things they would have picked.”

The effort is unnecessary, the chaplain said, because chaplains routinely reject any materials that incite violence or disparage, and donated materials already had to be approved by prison officials. Prisoners can buy religious books, he added, but few have much money to spend.

Religious groups that work with prisoners have privately been writing letters about their concerns to bureau officials. Would it not be simpler, they asked the bureau, to produce a list of forbidden titles? But the bureau did that last year, when it instructed the prisons to remove all materials by nine publishers — some Muslim, some Christian.

The plan to standardize the libraries first became public in May when several inmates, including a Muslim convert, at the Federal Prison Camp in Otisville, N.Y., about 75 miles northwest of Manhattan, filed a lawsuit acting as their own lawyers. Later, lawyers at the New York firm of Paul, Weiss, Rifkind, Wharton & Garrison took on the case pro bono. They refiled it on Aug. 21 in the Federal District Court for the Southern District of New York.