"I Done My Duty": The Complete Story of the Assassination of President McKinley Book

I was pleasantly surprised by this book. The 400 page book kept my interest, even though it was a lot of information on a very short train of events.
Sometimes I've felt that we have a picture of McKinley being the person warming up the presidency for a young TR. Although this isn't a full description of McKinley or his presidency, it shows some of his class and charm which may have resulted in his popularity. Still, McKinley was overshadowed by his successor and the Great Depression sandwiched between two World Wars, so this compelling story seems to have been obscured over time.
If you want to learn about this event, this book is a good choice. This is really where the book shines. It is very specific to this unfortunate act, so, even though it does mention many other things, it is a book that will give you a lot of information on this assassination rather than one that gives a general overview of the McKinley or Roosevelt presidencies.