Amazon has broken a what has been significant piece of functionality in the iOS Kindle app, the ability to send a book’s title and author to Drafts. I used to open About This Book, tap Share and then select Drafts, and the result used to be that a new draft opened with the book title and authors. Today when I did this Drafts wasn’t even an option!
Update: Turns out the issue was not just with the Kindle app, Drafts was gone from the share sheet in all apps. After searching the Internet, I restarted the iPad and that seems to resolve the problem.