The PRS-300 and PRS-600 were spotted by keen eyed forum members over at Sony Insider, and they haven't been around for long, with creation dates of July 2009.
Even more interesting that the current PRS-700 Reader is no longer for sale over at SonyStyle, meaning the two newbies could be sweeping in as replacements.
The PRS-300 is the lower end of the two models with a 5-inch display, 440MB internal storage but no expandable memory card slot. The PRS-600 on the other hand boasts a 6-inch touchscreen display, audio output and the same 440MB internal storage, but this time with a card slot to expand it if needs be.
Both models will be available in red, black and silver, but that is all the info the service manuals are giving up. We'll be keeping our ear to the ground for the latest on this, so keep it locked to Stuff.tv for the news as we get it.
In the meantime see what we thought to last year's Sony Reader PRS-505 in our full review, and as always leave us your thoughts on e-books and e-readers below.