Some of the most expensive books in the world (18 pictures)

What makes a book rare and valuable? It all comes down to supply and demand — and condition. The rarest books in the world are highly sought after by collectors because they’re associated with a particular author or a major historical event or era, or simply because they’re incredibly old.

The world’s most expensive book ever is Leonadro da Vinci’s Codex Leicester – original and only copy of the notebook. It costs $30.8 millions! Books we’ve selected in this article are not so valuable, but their prices are also extremely high.

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