I submitted this photo to the Sony Stories contest, but I guess I didn't win anything... since I've already taken the photo, why not share it here?
Being in the USA, for the longest time I thought the only accessories for the PRS-505 were the Premium Leather Cover, AC Adapter, and Lighted Cover (the premium and regular tan covers are at the lower left). Only recently I found that there were a whole slew of accessories that were only released in Europe, and never made it to our shores – but thanks to the internet, I was able to acquire them as well. So in the picture you’ll see a Trifold Cover, a black Premium Cover (it's of a different design than the American version), a Silicone Cover (to protect it from spills), and a plastic screen protector. There's also a backup reader in the lighted case. The only accessory I'm missing is a clip on light that was released in Europe, but I'm not in a rush to get that.
To my knowledge, this is the largest number of accessories that Sony has released for any one reader, and probably ever will.
Now if only I had more time to actually read...