In another life I was a successful marketing manager – I even have a degree on the subject. So, when my first book,The Blue Suitcase, was published a couple of years ago,I was not daunted by the thought of marketing it. Far from it. It seemed as easy as floating on water. And I certainly didn’t think I needed to use social media to help me – I’m sort of old school when it comes to technology.This is still my phone today. You get the picture?

I only realised how wrong I...