If I was using Linux or Cygwin I'd do:
cat 14885* > Rinehart.brf
If I was using Windows 7 I'd go to the DOS prompt and do:
copy /<some switch or other> Rinehart.brf
But I can't figure it out on Windows 10, either in Windows Explorer or PowerShell. Perhaps the biggest problem is that each volume ends with something (Ctrl+Z?) that signals the end of text and I have to defeat recognition of that switch in order to get the whole book.
I read the book, by the way, on WordPad and set the BrailleMovesActive script to make the active cursor track the Braille display as I read through the book.
If you'll excuse a small commercial, I wrote a rather complete set of scripts for Linux I can send to anybody who's interested. Write to firstname.lastname@example.org.
Thanks for any help,
"Never imagine yourself not to be otherwise than what it might appear to
others that what you were or might have been was not otherwise than what
you had been would have appeared to them to be otherwise."