The conservative NY Sun has published two reviews of Rick Perlstein's Nixonland. The first review, published at the end of May, was glowing:

You don't have to agree with everything in this monumental account of politics in the 1960s and 1970s to find Rick Perlstein's"Nixonland" (Scribner, 896 pages, $37.50) interesting and even engrossing. The book is a masterful retelling of the turbulent period between the crushing defeat of Barry Goldwater by Lyndon B. Johnson in 1964 and the equally stunning loss by George McGovern to Richard Nixon in 1972.

Then came this from the pen of Conrad Black, the disgraced businessman who moonlights as a historian:

Mr. Perlstein engages in the usual psychological liberties of Nixon-haters, denigrates his hard-scrabble, terribly earnest Quaker youth, endlessly engages in unsubstantiated mind-reading, and gives Nixon no credit for anything but a manic, corrupt, rat cunning.

Mr. Black, writing from his prison cell, was an investor in the Sun.