That title sent me down a rabbit hole in my head and across a few imaginary library stacks. I looked for a clear, single-author attribution for 'A Gift Paid in Eternity' in my memory of mainstream and indie publishing, and nothing popped up as a well-known, traditionally published novel under that exact English title. That doesn't mean the work doesn't exist — there are a lot of self-published books, translated works with alternate English titles, and fanfiction pieces that use evocative phrases like this one. In my experience hunting for obscure reads, a title like 'A Gift Paid in Eternity' is the kind of name you'd see on a serialized web novel, a self-published paperback on Kindle, or a short story in an online anthology that never made it into library catalogs.
From one angle, it could be a translation: many Chinese, Japanese, or Korean web novels get multiple English renderings, so 'A Gift Paid in Eternity' might correspond to a more commonly known work under a different English name. From another angle, it could be an independently published romance or speculative short by a niche author—those often fly under radar on Goodreads and WorldCat unless they pick up reviews. When I chase down mysterious titles, I check Amazon listings (especially Kindle Direct Publishing), Goodreads, Library of Congress, and Archive of Our Own or Wattpad for fan-created stories. If it's a short story in a themed collection, the author might be listed under the anthology rather than the title itself.
I can't give you a single, irrefutable author name for 'A Gift Paid in Eternity' because I don't have a clear match in mainstream bibliographic records, but based on patterns I've seen, your best bet is searching ebook platforms or looking for a foreign-to-English translation note. If it turns out to be a lesser-known indie author I haven't encountered, I’d be excited to read it—titles like that promise a bittersweet, epic-feeling read, and I love discovering hidden gems that feel like whispered myths given modern coatings. If you stumble across a copy, tell me about it sometime; my curiosity’s officially piqued.