To deliver an idea perfectly — not so short that it’s not well elaborated, or too long that it seems to be simply keeping pace with advertisers and marketing — is what the newest Kindle Singles from Amazon is aiming. With 10,000 to 30,000 words or 30-90 pages in story-length, it is perfect  to carry out a single idea.

Kindle Singles is about twice the length of a New Yorker feature or similar to a few chapters of a book, and is priced less than a book in the Kindle Store. With the announcement of Kindle Singles’ launch, Amazon is calling serious writers, thinkers scientists, business leaders, historians, politicians and publishers to take part.

“Ideas and the words to deliver them should be crafted to their natural length, not to an artificial marketing length that justifies a particular price or a certain format,” said Russ Grandinetti, Vice President, Kindle Content. “With Kindle Singles, we’re reaching out to publishers and accomplished writers and we’re excited to see what they create.”

“Buy Once, Read Everywhere” feature still applies for Kindle Singles with the Whispersync technology, where you can pick up the last page you left behind. Also, the contents will be automatically backed up online in your Kindle Library. The contents are available on Kindle, Kindle 3G, Kindle DX, iPad, iPod touch, iPhone, Mac, PC, BlackBerry, and Android-based devices.

For the growing Amazon publishing business, it’s also a handy marketing ploy. Amazon wants to keep readers interested in e-books, as well as advertisers.   Amazon’s been on quite a tear recently, pushing its own e-reader and related Kindle apps across various devices, garnering the support of publishing houses and partners.  As the print industry finds new ad revenue in the form of digital distribution, expect to see a whole lot more targeted marketing around e-readers and e-books, especially from big players like Kindle, B&N, Borders and other platforms hoping to compete in this market.