On many books it’s written[ul][li]‘bestseller’[/li][li]’#1 bestseller"[/li][li]‘international bestseller’[/li][li]’#1 international bestseller’[/ul]Are these somehow standardized well-defined terms, or are they just maketing hype added by the publisher to any title they expect to sell more than a dozen of books by?[/li]
One would like to think that in order to sell a book as a “#1 bestseller”, it ought to have been at the top of some respectable chart (eg. NY Times bestseller list) at some moment, but considering how many books that are marketed as such, that does not seem plausible.
Normally this property of bestselling is attributed to the book, but sometimes one sees blurbs like ‘from the bestselling author of xyz’, where it’s clearly the author who’s selling best.
It is also worth noting that some dictionaries prefer ‘best-seller’, but ‘bestseller’ seems to be the dominating spelling on the web.