Mission Impossible lady Rebecca Ferguson on for The Girl on the Train

A pretty weird thing happened not so long ago - my train commute became filled with people reading a book called The Girl on the Train. Oftentimes they were girl. It all felt entirely meta.

London-based journalist turned author Paula Hawkins published the book in January 2015 as her first novel. It had sold 1 million copies by the end of March and stayed atop the UK best-seller list for a staggering 20 weeks - the longest of any book. Ever. It's the story of an alcoholic woman in early 30s who is having a pretty trying time who witnesses something from her train window during the morning commute and gets drawn into an ever more complicated world.

As is the way of things, the movie rights to the book were actually sold long before it reached shelves and production is already ramping up. Emily Blunt has been mooted for the lead role of Rachel and we're hearing more casting news now in the form of Rebecca Ferguson.