The publisher of Fifty Shades of Grey is hailing it the best-selling book in UK history – and now an album’s on the way.

The first of three erotic novels by E L James has sold more than 5.3 million copies in print and e-book.

EMI’s releasing a compilation of classical music that inspired the author EL James.

The 15 tracks are pieces referenced in the trilogy – from Pachelbel to Bach.

The album’s due out in September.