Uh oh. Yes, you need an adapter. That's a tough one. I mentioned in my first hands on
article,
"WARNING - Don’t insert a wrong sized card! And if an adapter is needed, be sure to use one. If you insert one of the smaller cards into the slot by mistake, it may need to go to the factory to have the case opened to remove the card. This was a lesson we learned when one of us put the wrong size card into the slot. Fortunately, the factory was next door, so it was a good learning experience and not a tragic event!"
I'd call Sony support to see if they can give you some ideas. Did it "click" into place, or is it just laying in there? Maybe you can shake it out, or use small tweezers, or a toothpick to prod it while it's upside down?
I'm not sure what opening it would do to help, or how easy that is, or if it voids the warranty. Please let us know what you figure out. You're not the first to do this, and I'm sure you're not the last, either.
Anyone else have any ideas?
Oh.... and you do have all that internal memory to work with in the meantime even if it is stuck. You should still be able to manage those books from the Sony Connect software.