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booksScribd, a popular site where users can publish and share documents, just raised $13 million in its third round of funding.

The San Francisco startup’s ambitions seem have expanded quickly over the past couple of years. It launched a marketplace for selling documents and e-books, and even added an option for users to turn those documents into printed copies. The company also said it wants to make its documents available on every mobile device and e-book reader.

“2011 is going to be a milestone year for us,” Scribd chief executive and co-founder Trip Adler said in a written statement. “As the world rapidly changes the way it reads, we are rapidly preparing to change the way we deliver what they read.”

The company says it reaches 60 million readers every month.

The new round was led by Australian firm MLC Investments and SVB Capital. Scribd said all of its past backers (including Redpoint Ventures, Charles River Ventures, and Kinsey Hills Group) participated in the new round. Scribd has now raised a total of $25.8 million.

[image via Flickr/Ian Wilson]

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