Can you say interesting book?

A books about a man thinks he is helping by assassinating the president and then breaking away to another state because he thinks there they will congratulate him and honor him, sounds like a crazy book but actually it's a non-fiction book. Killing Lincoln by Bill O'Riley is that book between the fact that it is about Lincoln's assassination and that it talks about the Civil War, the people of the time, and John Wilkes Booth, the assassinator the book is very interesting.
The book is written by a man who likes to take his own perspective of something put it into books and influence others but this time it's different it seems as though the book has no opinion it's just facts put into interesting words and sentences. This makes the book a little challenging to read but it's worth it because you get the real facts about the assassination in every sentence of the book.
If you looking for a book to read that can be just a little challenging but is really interesting read this because every sentence is teaching something new about the history of America. Isn't that what you look for in a good non-fiction book?