Stepping Up (by Sarah Turner)

(Amazon UK link) If I had seen Sarah Turner’s novel ‘Stepping Up’ in a charity shop or book sale, I might well have bought it. The cover is appealing, the blurb on the back intriguing. As it was, I bought a Kindle edition on special offer, because the book was allocated for the June meeting of our local reading group. 
When I started reading, I thought it was going to be a light-weight and somewhat fluffy novel. I was surprised, as the books chosen for the group are usually more literary, encompas...