Does anybody know why these are all through my bookshelf? It says these books aren't able to be listed! What's up with that???? Has it happened to anyone else?

It happened to everyone.  Those are books you got through PBS and haven't reposted.  I just deleted almost all of mine because it clutters my bookshelf.  Scroll down and read sherri (mamadoodle)'s post  -- OT But Important  for more info

They combined the Books to Repost list (books you've gotten from PBS) and your Bookshelf. No one can see them but you. They are annoying though.  I deleted all my non-posted books. Several of them were sent off on deals or as freebies.  To delete them just check the box and hit delete at the top of the page. Make sure you don't accidentally delete any of your posted books. I think you can sort it so that it puts the on hold ones at the end.

thank you both.  drat it anyhow!  it's an annoyance.

It is annoying but you don't have to take the time to delete each and every book. Go to the "View" tab at the top of the  list (in yellow) and click Posted books and all the ones not on your bookshelf will disappear.