A twisty thriller set against the windswept shores of Cornwall? It’s a premise that may hint at another writer whose dark tales are synonymous with the county. Yet debut novelist, Jane Jesmond, takes an effective (and bloody) stab at taking readers on a thrill ride amongst these same rocky outposts and smugglers coves. Our protagonist is, however, very different to Daphne du Maurier’s. Jen Shaw, a free climber, is in trouble. She might be out of rehab from her high-octane addiction, but she’s not on terra firma for long. This time, though, it’s a mystery how she finds herself swinging from a lighthouse – and even perhaps, who she really is. Done well, this kind of puzzle-solving story is the holy grail for publishers of commercial fiction, captivating fans of The Girl On The Train or Before I Go To Sleep. And if you loved them, On The Edge will certainly satisfy your crime cravings.