We're told that happiness is in the extraordinary. It's on a Caribbean sun lounger, in the driving seat of a luxury car, inside an expensive golden locket, watching sunrise from Machu Picchu. We strive, reach, push, shoot for more. 'Enough' is a moving target we never quite reach.

When we do brush our fingertips against the extraordinary a deeply inconvenient psychological phenomenon called the 'hedonic treadmill' means that, after a surge of joy, our happiness level returns to the baseline it was at before the 'extra' event.

So, what's the answer? The Unexpected Joy of the Ordinary theorizes that the solution is rediscovering the joy in the ordinary that we so often now forget to feel. Because we now expect the pleasure of a croissant, a hot shower, a yoga class, someone delivering our shopping to our door, we no longer feel its buzz. The joy of it whips through us like a bullet train, without pause.

Catherine Gray was a grandmaster in the art of eye-rolling the ordinary, and skilled in everlasting reaching. Until the black dog of depression forced her to re-think everything.

Along the way, she discovered some surprising realities about the extraordinaries among us: that influencers risk higher rates of anxiety and depression and high-rollers are less happy.