Limitless by Nuala Moore. The sea has always been a part of Nuala Moore's life: her earliest memory is of jumping off her father's fishing boat in Dingle Harbour and swimming back to shore. Since then, she's swum in some of the coldest, remotest and most dangerous waters in the world, from the Bering Strait to the Drake Passage.  

After years of marathon swimming, Nuala struggled to balance sacrifice and achievement. Her work-life balance, coupled with caring for her father, forced a change in her pathway. She turned to ice swimming. For Nuala, these extreme situations offered freedom and a chance to find her true north. Nuala believes that everyone is capable of greatness, whatever shape that might take. Limitless is her breathtaking memoir, detailing what goes through her mind when she's in the water and how, when she returns home, she processes the fallout of pushing herself to the brink.