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In front of an audience at this year’s Hay Festival Helen Lewis talks to three prize winning authors about their work. Damon Galgut’s Booker-winning The Promise tells the story of a family and a country – South Africa – and the failed promises that destroy them both. The exciting promise of a super-connected world where memories are currency is set against the quest for privacy in Jennifer Egan’s new novel The Candy House. And Margo Jefferson examines every passion, memory and influence – from family to jazz to art – in her new memoir, Constructing a Nervous System. Producer: Katy Hickman

Adam Rutherford explores how other species can help us understand our own. The world-renowned primatologist Frans de Waal has spent decades observing the behaviours of chimps and bonobos. In Different: What Apes Can Teach Us About Gender he looks at, and questions, the interplay of biology and culture. Using his knowledge of apes he challenges widely held beliefs about masculinity and femininity and assumptions about authority, power, cooperation and sexual behaviour. Nichola Raihani’s research focuses on the evolution of social behaviour in humans and non-human species. In her book, The Social Instinct, she looks at the science of cooperation and how humans have evolved socially and built, and fought over, hugely complex communities. But she also suggests we might have something to learn from the pied babblers of the Kalahari, and the cleaner fish of the Great Barrier Reef – two of the most fascinating and extraordinarily successful species on the planet. While ants and honey bees are often held up as exemplars of social cohesion, the entomologist Seirian Sumner wants to rehabilitate the much-maligned thug of the insect world, the wasp. In Endless Forms: The Secret World of Wasps she shows how wasps are older, cleverer and more diverse than their evolutionary new-comer the bee. And she makes the case that they hold hidden treasures of relevance to human culture, survival and health, and one species even taught us how to make paper.Producer: Katy Hickman

Every moment of the day tiny biological clocks are ticking throughout the body, but Russell Foster, world-renowned expert in circadian neuroscience, warns that modern life is playing havoc with these ancient and delicate mechanisms. In his latest book, Life Time: The New Science Of The Body Clock And How It Can Revolutionise Your Sleep and Health, Professor Foster reveals how this essential part of our biology works. He tells Tom Sutcliffe how new understandings about our daily routines could help reset how we live and sleep.ViSiBLE is a professional theatre company dedicated to creating new and provocative works, with and about older people. Its latest performance, Five Characters in Search of a Good Night's Sleep, is at the Southwark Playhouse until 21st May. ViSiBLE’s founder, the playwright Sonja Linden, says the new piece was inspired by the experiences of the actors who as they’ve aged have found sleep more elusive and sleep-inducing techniques more desperate. Ros Holmes is a lecturer in Chinese Studies at the University of St Andrews. Her research focuses on ideas about sleep and insomnia, and how they’ve been represented in the visual culture of twentieth century and contemporary China. From the images of ‘national awakening’ in the early years of the Republic and the always-alert workers of the Cultural Revolution to the cities that never sleep today – sleep deprivation has become part of life in China.Producer: Katy HickmanPhoto Image: 'Five Characters in Search of a Good Night's Sleep' (credit: Bessell Photography)