More than 1m readers in the US alone have already bought Grey, which retells EL James’s hit story from the hero’s point of view.

"Fifty Shades of Grey" author, EL James, has penned a new entry in the series that takes the point of view of its male character, Christian Grey.

Millions of fans are expected to flock to the release of the erotic movie based on the popular book – despite the story being rubbished by critics.