For those who own a Numbered or Lettered edition of Misery by Stephen King, If Suntup Editions publishes another Stephen King book in the future, you will not lose your matching rights if you choose to pass on any non-Stephen King book.
Rights remain with the physical book. If you own the latest Suntup Editions publication, you have first refusal rights to match your number or letter on the next release. If you pass on a new release, you relinquish rights to that number or letter for future releases.
If you sell a book, then number or letter rights to that book transfer to the new owner. Rights cannot be retained after you sell a book.
Buyers and sellers should be aware of the rights transfer registration forms found here.