Author Hilary Boyd's first published book Thursdays in the Park has topped the e-book charts.
The book is about a love affair between a married woman in her 60s and a man she meets in a park.
It has been already been hailed as a "gran-lit" classic, sparking comparisons with another e-book sensation, Fifty Shades of Gray.
Speaking to the Today programme's Evan Davis, Ms Boyd explained where her inspiration came from: "I saw this guy across the playground and thought hmm
"It's about romance
we all have that thing in us that wants that romance in our lives."
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