The chapter structure does the heavy lifting. Grant picks apart a single behaviour, shows the research behind it, and then shows what it looks like when someone gets it slightly wrong, which is far more useful than a list of principles. The section on how people signal that they are listening, and how badly most of us do it, made me reconsider a dozen conversations.

The multi-voice production is the other reason to listen. Grant carries the argument, the guests bring their own material and their own registers, and the changes of voice break up what could have been six hours of one man being reasonable. Brené Brown's sections in particular have a warmth that the book needs.

One thing to know: six hours and forty-eight minutes, narrated by Grant with a cast of guests, and a standalone book. The guest voices are what keep a six-hour argument from becoming a lecture.

If this is your kind of thing, Think Again is Grant on changing your own mind, and Hidden Potential applies the same rigour to growth. This one is the most personal of the three, and the easiest to act on.

The research is presented as evidence rather than decoration, and Grant is careful to say when the finding is thinner than the headline suggests, which is rarer in this genre than it should be.

There is also a useful, slightly uncomfortable chapter on the cost of being the one who always reaches out, which most books in this territory skip. Grant is also unusually good at admitting where his own advice has failed him, which gives the book a humility that the genre rarely manages.