“The book contained a password which the authors had been told by Julian Assange was temporary and would expire and be deleted in a matter of hours..." That do

“The book contained a password which the authors had been told by Julian Assange was temporary and would expire and be deleted in a matter of hours..." That doesn't make sense as stated. Perhaps they meant that they believed that the encrypted files would all be deleted in some secure way. Strange they just didn't say that.