In an apparent dispute over sales terms with big five publisher Hachette Book Group, Amazon is slowing delivery of select Hachette titles, The New York Times reports. Among the affected titles are James Patterson’s “Alex Cross, Run” and Stephen Colbert’s “America Again: Re-becoming the Greatness We Never Weren’t,” according to the Times. Amazon has used similar tactics in the past, including removing “buy buttons” from nearly every Macmillan title in 2010 over disputed e-book sales terms.

Amazon is in some cases delaying sales by format. All English language trade paperbacks by Malcolm Gladwell, for example, ship in two to three weeks, while Gladwell’s hardcovers ship immediately.

The availability of the titles Amazon delays appears to shift from time to time. “Alex Cross, Run” is listed as in stock this morning, while Amazon is still slow-walking “America Again,” which is available in two to three weeks in hardcover.

Self-interest protects certain formats: all titles appear to be available in Kindle editions.