This book, part of the Signature series, can be found in many public and school libraries (as indeed was where I found it today). It does not go into great detail about Bhutto, and glosses over many of the pieces of information that might be important in figuring out why she was controversial, and why she was ultimately assassinated while trying to make a political comeback. This is perhaps to be expected in a book in this series -- it is written for late elementary through early high school audiences, and thus has to tread carefully both in content and complexity.
It does cover the basics of Bhutto's life, upbringing, education, and career. It also covers a bit of Pakistan's modern history, and the history of Bhutto's family, which has seen its own share of sadness and death -- Bhutto's father, himself a Prime Minister of Pakistan, was killed by the military in a coup. Bhutto herself was the first female Prime Minister of a Muslim nation, and as such as an inspiring figure to many. Also, she and her family were identified more with the populist causes of Pakistan, rather than the wealthy or the religious interests which are so entrenched in Pakistan's society.
This book is a quick read for anyone of high school or greater education, and while it gives some basic information about Bhutto, it does not give great insight into her character or the character of Pakistani politics. For that, one needs greater depth and detail -- perhaps the upcoming autobiography of Bhutto (due to be released on April 2008) will give more insight. However, one piece comes out in this book -- Bhutto was an optimist, and that optimism carried her back to Pakistan.