It seems Sony is planning to fight back against the Amazon Kindle's popularity with not one, but two new Readers.

Sony's ebook reader line will soon see the addition of the PRS-300 and the PRS-600, according to just-revealed, leaked service manuals.

The PRS-300 appears to be a model for the lower-end, or entry level market offering a 5-inch display and around 440MB of non-expandable storage.

The PRS-600 will offer a 6-inch touchscreen, audio output, memory card slots and an internal memory of 380MB.

Both models are due to be available in silver, red, and black, although when, where, how, what and why is still to be ascertained.

We will keep you posted.