A copy of the world's most expensive book is expected to sell for more than $12 million when auctioned in London later this year.
Only 119 complete copies of John James Audubon's Birds of America are known to exist, and 108 are owned by museums and libraries.
A separate edition of the metre-high book sold for a record-breaking price of $12 million a decade ago.
The copy going under the hammer at the London auction house of Sotheby's in December comes from the collection of the late Lord Hesketh.
It took 19th-century wildlife artist John James Audubon 12 years to complete his study, which contains 1000 life-size illustrations of nearly 500 breeds.
