Sarah McCartney is the founder and perfumer at 4160Tuesdays, an independent perfumery in west London. For fourteen years, she wrote for the Lush Times, the in-house newspaper at Lush Fresh Handmade Cosmetics. In 2010 she wrote a novel, The Scent of Possibility, then started to make the fragrances she'd described in her book. Sarah's fragrances have been nominated for three Fragrance Foundation Awards, and she has won the Eau MG Readers Award for Best Indie Fragrance House, and Best Indie Fragrance.

Jeremy Kourdi is a highly regarded executive coach and author, whose books have been translated into ten languages. He was previously Head of Publishing and Research at the Chartered Management Institute, and Senior Vice-President at The Economist Group. He holds an executive coaching certification from Henley Business School and an MA in International Relations. He works with market-leading businesses and executives worldwide. He has interviewed leaders across sectors as well as heads of governments and brings this broad experience to his writing.