the world's most expensive book

A thick book sealed with the title "The Onliest and The Deepest Secrets of The Medical Art" is a unique item, a rare and expensive in the world. In this book only contains a simple sentence. But worth U.S. $ 20,000.

This book is the last work of Boerhaave, a Dutch physician who wrote the book "Elementa Chemiae" and died in 1738. Before his death he left a sealed thick book with the title "The Onliest and The Deepest Secrets of The Medical Art", which means less is more "Secrets of the most profound and satu2nya in the art treatment. "

When the book was auctioned, sold for U.S. $ 20,000. But it turns out, after sealing the book is opened, the winning bidder was found 99 of 100 page book was empty there was no writing at all. In addition to the cover, a row of letters that make up a row of short posts in one page, in the sense discussed free English reads, "Take care of yourself to stay calm, keep the legs to keep warm, and you will make even the best doctors to be poor."