is taking a little heat for not disclosing on air its corporate ties to former White House terrorism official Richard Clarke
's controversial new book Against All Enemies
, which was the subject of a segment on Sunday's show. The book is published by CBS' sister company Simon & Schuster. "60 Minutes
has interviewed authors from virtually all the book publishing companies over its 36 years and is beholden to none of them," a CBS rep says. "Publishers seek out 60 Minutes
because it's television's No. 1 newsmagazine."