To date Chapman has written some 36 books, with international sales exceeding 2 million copies.

As of December 2011, the single sales have exceeded 220,000 copies.

Its sales exceeded 1,5 million copies in just three months.

The worldwide sales for the album exceed two million copies.

The peak of the sales exceeded 100,000 copies per issue.

The sales of album exceeded 300.000 legal copies in Russia.

Since 1959, total sales of three editions in four decades has exceeded ten million copies.

Total sales for the game exceeded more than one million copies worldwide.

In 1967, circulation exceeded 50,000 copies for the first time.

Total sales of the novel in 2009 exceeded 500,000 copies.