Correction to This Article
The review incorrectly said that it cannot search the text of a Portable Document Format file; like most other PDF viewers, that device can do so.

With Kindle DX, Amazon Writes New E-Book Chapter

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By Rob Pegoraro
Sunday, June 21, 2009

Lots of novels have the potential for one good sequel, but not too many can sustain a story over a third book.

Amazon's new Kindle DX is like that extra sequel. This $489 wireless tablet, shipping June 26, doesn't do much to advance the electronic book narrative beyond Amazon's earlier Kindles. It does, however, introduce two plot elements that might play a larger role in future e-book chapters.

The catch is, neither of those changes involves the Kindle DX's most obvious upgrades.

The big one is its screen: Instead of the $359 Kindle 2's 6-inch display, the DX includes a higher-resolution, 9.7-inch version that approximates the dimensions of a hardcover book.

The DX uses the same electronic-ink technology as its little brother, so it offers similar benefits and frustrations. Text appears sharp and flicker-free, even in sunlight. But the DX's screen still can't match the contrast of newsprint, still takes a second or so to draw a new page (after first flashing a photo-negative image of the current page) and still cannot portray more than 16 shades of gray.

The DX can also rotate its onscreen image to match how you hold the thing: If you grasp the DX sideways, the display automatically pivots from its standard portrait orientation to a widescreen, landscape mode. The DX will even invert the image if it thinks you're holding it upside down, though that's more distracting than useful.

The DX's larger display contributes to its slightly heftier weight, just under 19 ounces. Amazon's $49.99 leather cover adds almost 11 ounces.

It does not, however, seem to affect the DX's battery life, which Amazon estimates as "up to 4 days with wireless on" -- the same number it cites for the Kindle 2.

With the bigger display comes more storage, but that doesn't yield a major improvement either. Amazon says that the DX's 3.3 gigabytes of flash memory can hold 3,500 books, up from the 1,500 you could squirrel away on a Kindle 2 -- but how many books do most people need to carry at once anyway?

Those upgrades also can't do much to improve the already-excellent experience of buying books using the Kindle's Sprint-provided wireless connection. To its credit, the Seattle retailer's selection keeps growing: As of Thursday evening, the Kindle Store carried 307,420 books (note that some cost as much as print editions sold on Amazon), 40 newspapers, 30 magazines and 5,775 blogs.

The DX's more useful contributions come in its software and marketing.

Unlike older Kindles, the DX can display PDF (portable document format) files without prior conversion -- plug the device into a computer with its USB cable, drag and drop PDFs into its "documents" folder, and those files will appear on the DX's home screen.


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