It’s a safe bet that there will be barely a single reader of E&T who has not heard the name of arguably the most famous person in the world of technology today. But let’s imagine for a minute that there is; asking the question that journalist Michael Vlismas has set out to answer - who is Elon Musk?

The short response is readily available on virtually any newsfeed you care to consult, for the co-founder and CEO of Tesla – depending on how you measure it, probably the richest human on Earth – can’t be accused of staying out of the limelight.

The longer answer comes in the form of ‘Elon Musk: Risking it All’ (Icon Books (£14.99, ISBN 9781776191857), which depicts the entrepreneur as a boundary-pushing tech-cult billionaire. He’s also a trigger-happy tweeter with a ‘will he/won’t he?’ starring lead in the switchback ride of whether he’ll end up owning Twitter.

Writing a biography of Musk presents the author with something of a unique challenge in that...