This is the story of the family of John and Sarah O’Brien of Bandon, Co. Cork, Ireland, and their descendants. They had eleven children and more than 60 grandchildren. They in turn had more than 120 children, and the third generation of descendants already number more than 100. The year of the publication of this book, 2013, is the 50th anniversary of the death of Sarah O’Brien and at least 200 of her direct descendants are currently alive.