An unexpected treasure — 1937 Hobbit found and sold for Smaug-sized £43,000

In a mighty twist fit for Middle-earth, a rare 1937 first edition of JRR Tolkien's epic novel, The Hobbit, was unearthed in a southwest England home and sold at an auction for a record-breaking £43,000 ($57,000).

Purchased by a private collector in the United Kingdom, the book is one of 1,500 original copies of the British author's seminal fantasy novel that were published in 1937.

Of those, only "a few hundred are believed to still remain", according to the auction house Auctioneum, which discovered the book on a bookcase at a home in Bristol.

Bidders from around the world drove the price up by more than four times what the auction house expected for the manuscript.

"It's a wonderful result for a very special book," said Auctioneum rare books specialist Caitlin Riley.

"The surviving books from the initial print run are now considered some of the most sought-after books in modern literature," Auctioneum said in a statement.

Auctioneum unearthed the book during a routine house clearance after its owner passed away.

"Nobody knew it was there," Riley said. "It was just a run-of-the-mill bookcase."

"It was clearly an early Hobbit at first glance, so I just pulled it out and began to flick through it, never expecting it to be a true first edition," she said.

"I couldn´t believe my eyes," she added, calling it an "unimaginably rare find".

The copy is bound in light green cloth and features rare black-and-white illustrations by Tolkien, who created his beloved Middle-earth universe while he was a professor at the University of Oxford.

The book was passed down in the family library of Hubert Priestley, a botanist connected to the university.

"It is likely that both men knew each other," according to Auctioneum, which said Priestley and Tolkien shared mutual correspondence with author CS Lewis, who was also at Oxford.

"The Hobbit", which was followed by the epic series "The Lord of the Rings", has sold more than 100 million copies worldwide.

The sagas were turned into a hit movie franchise in the 2000s.

A first edition of "The Hobbit" with a handwritten note in Elvish by the author sold for £137,000 at Sotheby's in June 2015.