After 30 years behind the microphone, Greg Cary left radio at the end of 2013. Widely regarded as one of Australia's most versatile and balanced talkback hosts, he was also a respected guest commentator for a decade on the popular morning tv show Sunrise. Here Greg pulls back the curtain on his life in media and beyond. An Absence of Certainty recounts some of the influential figures Greg interviewed, the issues he covered and shifts in media culture and political dialogue during a time of increasing polarisation. Greg weaves these between generous anecdotes about the experiences that shaped him, his audience, the media industry and the world more broadly. Invested with the characteristic warmth and humility that Greg's audience came to know during his acclaimed career, An Absence of Certainty lays bare all that's shaped him - wounds and all. While this is a memoir about media and Australia's collective social life, it's also a reflection on the time in which he grew up and the people he met along the way. More than that it's a letter to Greg's daughter, a gently cautionary and relentlessly perceptive tale of a life lived in uncertainty and hope.