Sony this week unveiled two new e-readers and is cutting prices of its e-books in a bid to maintain a competitive edge in the burgeoning digital book market -- though the devices lack key features offered by the rival Amazon Kindle.

The electronics giant introduced the PRS-300 Reader Pocket Edition and PRS-600 Reader Touch Edition, which will sell for $199 and $299, respectively. Both will go on sale at the end of August. Sony said the two new e-readers are part of a new line, and it appears they will replace older, more expensive versions of the Sony Reader, the 505 and 700, which cost $269 and $399.

Also, the price of Sony's e-books is being dropped to $9.99, from $11.99, bringing it in line with much of the competition.

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