Political, royal, and religious assassinations are an unfortunate part of human history. In the new book Famous Assassinations, author Sarah Herman gives a brief look at the assassinations that made history books.
Each chapter is short and too the point, but gives a more detailed look than a Wikipedia article. Famous Assassinations includes assassinations such as Martin Luther King Jr, but also much farther back like Julius Caesar and Pompey. Herman does include some anecdotes about the time period of the assassination and in cases like the Lincoln and JFK assassinations, some rumors and trivia.
Famous Assassinations is a solid place to start for those interested in this type of history.