Once, I fantasised about driving lorries. Beset by the insanity of life in a challenging 1,300-pupil inner-city comprehensive, I imagined being cocooned alone and unavailable (it was before mobile phones) in a warm cockpit, headlights on the road ahead, a 10-litre diesel thrumming, music playing.

Julie Jansen’s book, originally published in the United States, plays to that unsettled mood, giving reassurance that if you are serious about changing course, you can make a plan and get there. It defines six categories of work dissatisfaction - “been there, done that, but still need to earn”, “bruised and gun-shy”, “bored and plateaued” and so on - and works through them with self-assessment checklists and “you can do it” advice.

I’ve found within its pages a new role model in 69-year-old “Jack”: “When Jack isn’t working 60 hours a week, he flies a plane, sails, kayaks and collects cameras.”

I’ve got two cameras and I can ride a bike, but, hey, it’s a start.