One of Europe's top 500 entrepreneur is offering his first made-to-order edition of a diamond-encrusted book for the enormous amount of $6 million.

Voted one of Europe's top entrepreneur Roger Shashoua is offering the made-to-order book with 600 flawless real diamonds. They are on the cover of his book "Dancing With The Bear."

According to Shashoua, the "oligarch covered-book" is the world's most expensive book ever published.

His target readers for this diamond-encrusted book are Russian tycoons.

Shashoua's concept hopes to be adopted by Russian ex-pats in London. The book also detailed how he made $201 million through business in post-Soviet Russia.

"There is so much money floating around in Russia that it seemed entirely logical to produce a book designed for the Russian market," Shashoua said.

"I am just happy that conspicuous displays of consumption can now be associated with writing, rather than fashion accessories. I can only hope that oligarchs will read the book, rather than just keeping it locked away," he added.