Five hundred hardcover copies of the book have been printed to raise funds for the Home, which costs S$4.5 million a year to run.
In Germany alone, it has sold more than 700,000 hardcover copies since October.
David had a hardcover copy of that book in his hands right now.
Last year about 2.5 million hardcover copies of his books were sold.
Bloomsbury was so sure of its success that they printed 250,000 hardcover copies.
By 2011, the first book had reported sales of more than 1.4 million hardcover copies, and the series had grown to five titles.
It had a first printing of 265,000 hardcover copies, only about half of which sold.
The first printing is a respectable 15,000 hardcover copies, priced at $18.95.
The original publication was limited to 1,000 hardcover copies.
After a first printing of 10,000, it sold more than 100,000 hardcover copies.