This is not an easy book to read, but it is a very powerful one. I had previously read the absolutely excellent '[b:The Looming Tower: Al-Qaeda and the Road to 9/11|110890|The Looming Tower Al-Qaeda and the Road to 9/11|Lawrence Wright|https://images.gr-assets.com/books/1320471617s/110890.jpg|2567720]' which leads all the way up to that fateful day. This book, conversely, focuses purely on what happened during that 102 minutes - but in doing so draws together strands of history that led to making the catastrophe even more tragic than it perhaps had to be. Hearing the voices of those who lived and died in the towers during that day is very powerful, but so to is the narrator's clear and in my opinion very brave criticism of the issues that led to a higher loss of life.
One thing to note is that you can find a list of those who died at the back of the book. I, personally, referred to this whenever I read about a new person in the narrative because it didn't seem quite right to read it as a story in which you waited to 'find out' who lived and died at the end - it isn't a 'story,' after all.
Overall, a very informative, incredibly well-done and emotively powerful look into the 102 minutes of 9/11 and well worth a read if it's a topic that interests you.