How much copies did about a boy book sell?

There's no single definitive answer to how many copies of *About a Boy* by Nick Hornby have sold. Sales figures aren't always publicly released by publishers and can vary depending on the source and whether it includes all editions (hardcover, paperback, ebook, etc.) and translations. However, it's safe to say that *About a Boy* has sold millions of copies worldwide and is considered a very successful novel.