Complex sentence: The book is one of the first sympathetic accounts of the Kelly Gang, and it ends with a review by Ned's sole surviving brother, Jim, then-aged 70, going on at length about the injustice visited upon his family by the police.
Split into simpler sentences: The book is one of the first sympathetic accounts of the Kelly Gang. It ends with a review by Ned's sole surviving brother, Jim, then-aged 70, going on at length about the injustice visited upon his family by the police.