Today (2/24/18) I attempted to send 2 chapters out 8 of a book I am writing to an editing class. I copied the first 2 chapters of the book, and paste it on an email sight. Now I am missing chapters 2-4 and unable to retrieve them from anywhere.
Are these chapters all separate files? Look at the folder where you stored / edited them. It is also quite possible that instead of copy/paste, you did cut/paste, and now your files are in a different folder.