In the United Kingdom, the number of books required to be considered a bestseller can vary greatly. Generally, a hardcover book is considered a bestseller when it sells between 4,000 and 25,000 copies per week. This range is quite broad, meaning that a book can become a bestseller with a relatively low number of sales.
The bestseller status of a book is determined by weekly rankings in the national print sales tracking service, BNC SalesData. This service tracks the sales of books across the UK and is the main source of information for publishers and booksellers when it comes to determining bestsellers. It is also used to measure the success of a book, as well as to determine which books are popular with readers.
It is important to note that the number of books required to be considered a bestseller in the UK can vary depending on the genre of the book. For example, a book in the romance genre may need to sell more copies than a book in the non-fiction genre in order to be considered a bestseller.
In addition, the number of books required to be considered a bestseller can also vary depending on the time of year. For example, books released during the holiday season may need to sell more copies than books released during other times of the year in order to be considered a bestseller.
Overall, the number of books required to be considered a bestseller in the UK can vary greatly. However, generally speaking, a hardcover book is considered a bestseller when it sells between 4,000 and 25,000 copies per week. This range is quite broad, meaning that a book can become a bestseller with a relatively low number of sales.