Brothers and sisters often dare each other to do things - it's what siblings do. However, when Connie Johnson dared her brother Samuel to embark on a one-wheeled odyssey around Australia, she knew it was a big ask. But Connie knew exactly what she was doing and was sure he wouldn't say no. Not this time.

Born a year apart, Connie and Samuel Johnson have always been close. Sam was by Connie's side when she found out she had cancer at age twelve and again when she was diagnosed at age twenty-two. Then, at thirty-three, Connie was diagnosed with breast cancer; but this time she was told she would not recover.

As a young mum faced with her own death, Connie wanted to find some meaning in the chaos. And so she dared Sam to help her. Officially there were three aims: promote breast awareness, raise over one million dollars for research - and break the world record for the longest distance travelled on a unicycle. However, Connie had a secret fourth aim: to fix Sam. She had no idea if any of it would work out. Neither did he.

Part memoir, part travel diary, part conversation, Love Your Sister is Connie and Sam's inspiring, moving and unforgettable journey, told in their own distinctive voices. It's a story of love, family, cancer - and the generosity of ordinary Australians.