LONDON: A rare copy of John James Audubon's Birds of America, billed as the world's most expensive book, is for sale alongside a first edition of Shakespeare's plays.
One of only 100 or so remaining copies, Birds of America is valued at between £4 million and £6 million ($6.73 million and $10.1 million).
A Shakespeare First Folio from 1623 is expected to fetch at least £1 million ($1.68 million).
The books will be auctioned at Sotheby's.
By the book
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