Later in the event, Amal took a moment to thank her husband for his patience while she compiled the book with a close friend, Professor Philippa Webb from King's College London
"I think he's watching this downstairs in the kitchen, so I just want to say 'thank you,'" said Amal. "For my side, I can promise for the sake of our marriage that I will never do this again!"
The book, which took months to develop, aims to create a standard global definition of what the right to a fair trial actually means in practice.
Her hope is that it will be used by lawyers and courts to protect ordinary people from corruption, abuse of power, and oppression across the world
"The right to a fair trial is fundamental to all of our rights and to democracy," Amal said during the launch. "The world, as I sure you have noticed, is becoming increasingly authoritarian. And authoritarian leaders are increasingly using courts to consolidate their power.
"The judiciary is supposed to be our best protection against abuses of power but compliant or corrupt judges can also be a tool to stifle opponents and oppress minorities."
George has also been vocal in recent weeks about life with Amal and their three-year-old twins Ella and Alexander. While promoting his new film, The Midnight Sky, the actor told CBS Sunday Morning that meeting Amal and eventually starting a family with her ultimately changed his life for the better.
"There is no question that having Amal in my life changed everything for me. It was the first time that everything that she did and everything about her was infinitely more important than anything about me," said the actor.