Inserted page - "You've finished. Before..."
Apologies if this has been asked before. I wasn't able to find anything about it by searching.
I noticed that the last few files I converted to mobi now have a page added at the end about "Tweet/share that you finished this book".
Is there an option to not have this page inserted? I checked preferences but didn't see anything. I'm converting docs that I've created which aren't books. Thanks.