Why should you believe a bloke? 

Fair question. For a man to write a book on how women communicate at work is unusual – maybe daring and possibly reckless. It might seem a bit cheeky. If I don't want you to 'do it like a dude', what gives me the right to think I can help you? 

I’ve been making a living helping men and women express themselves better for more than a decade. In that time I’ve helped countless female clients face-to-face, none of whom has rejected any of my advice based on the difference between our genders. 

As much of this book is based on science, the gender of the author shouldn't really be significant. The physics you learned at school didn’t change with the teacher’s gender. The science works the way the science works. For example it's a scientific fact that women's voices are different from men's. The question is, what to do about it?

Expertise is independent of gender. For example, Dolce & Gabbana, Alexander McQueen, Karl Lagerfeld and Giorgio Armani – all men – have made huge contributions to women's fashion. Baroness Brady CBE, Shelley Kerr, Margaret Byrne and Katrien Meire – all women – have made huge contributions to men’s football (soccer).