Amazon is actively growing the library of digital book that are available on the device and recently it upgraded the Kindle DX with global wireless connectivity. Shortly after announcing the upgrade, Amazon also announced that it was opening its Kindle Digital Text Platform (DTP) to countries other than the U.S. and accepting books in English, German, and French languages.

Amazon announced today that it is now willing to share a higher royalty fee with authors and publishers who use the DTP. The new royalty fee is 70% of list price after removing delivery costs. Amazon points out that the new 70% program is in addition to the standard DTP royalty option already in place. The new 70% option will be available for publishers starting on June 30.

Delivery costs of the books are based on a price of $0.15 per MB meaning that the average 368KB book would cost about six cents to deliver. Amazon uses a book selling for $8.99 as an example. Under the current program, a book selling for $8.99 will get the author $3.15 per sale; the new program would get the author $6.25.

“Today, authors often receive royalties in the range of 7 to 15 percent of the list price that publishers set for their physical books, or 25 percent of the net that publishers receive from retailers for their digital books,” said Russ Grandinetti, Vice President of Kindle Content. “We’re excited that the new 70 percent royalty option for the Kindle Digital Text Platform will help us pay authors higher royalties when readers choose their books.”

There are numerous requirements to qualify for the new rate program. The price must be between $2.99 and $9.99 per book. The price must also be at least 20% below the price for a physical copy of the same book. The book has to be published in all parts of the world where the author or publisher has rights. The book has to be included in a broad range of Kindle features. Books published before 1923 will not qualify for the program and only books sold in America will be allowed in the program.