Book publishers in the US are seeing a trend – PC-based titles aren't selling, but Mac titles are.

Publishers Weekly has a report on the ailing computer book industry. "With a few exceptions, computer book sales have gone south," the report begins. It explains that publishers customarily expect to see sales pick up in August, but this has not occurred.

However, it seems Apple's ongoing strategy to re-ignite interest in the company and its products is paying off beyond the Apple box. The report says: "Macintosh titles, particularly those relating to Mac OS X, such as 'Mac OS X: The Missing Manual' (O'Reilly), and graphics-related books, such as those on Adobe Photoshop, Web publishing, digital photography and digital video, are selling well, buyers report."

Linux, Java and security titles are also selling well, the report claims.