Sony announced on Thursday that its Reader Digital Book will be able to read electronic books published using the .epub format that many of the largest book publishers are using.

Until now, Sony's e-book reader could only read books available from the Sony e-book store, PDF documents, and DRM-free text. Starting next month, the new PRS-505 Sony Reader model will be able to access secure DRM- and non-DRM-protected content in the .epub format, formerly called the Open eBook format. (Here's a review of the device.)