If you're searching for some uplifting bedtime reading, you might enjoy this e-book of a 1953 CIA report titled "A Study of Assassination," made public in 1997 as part of a Freedom of Information Act request. Here are a few choice nuggets:
Assassination is a term thought to be derived from "Hashish", a drug similar to marijuana, said to have been used by Hasan-ibn-Sabah to induce motivation in his followers, who were assigned to carry out political and other murders, usually at the cost of their lives.
It is here used to describe the planned killing of a person who is not under the legal jurisdiction of the killer, who is not physically in the hands of the killer, who has been selected by a resistance organization for death, and who has been sele cted by a resistance organization for death, and whose death provides positive advantages to that organization….
The essential point of assassination is the death of the subject. A human being may be killed in many ways but sureness is often overlooked by those who may be emotionally unstrung by the seriousness of this act they intend to commit. The specific technique employed will depend upon a large number of variables, but should be constant in one point: Death must be absolutely certain. The attempt on Hitler's life failed because the conspiracy did not give this matter proper attention…
It is possible to kill a man with the bare hands, but very few are skillful enough to do it well. Even a highly trained Judo expert will hesitate to risk killing by hand unless he has absolutely no alternative. However, the simplest local tools are often much the most efficient means of assassination. A hammer, axe, wrench, screw driver, fire poker, kitchen knife, lamp stand, or anything hard, heavy and handy will suffice. A length of rope or wire or a belt will do if the assassin is strong and agile. All such improvised weapons have the important advantage of availability and apparent innocence. The obviously lethal machine gun failed to kill Trotsky where an item of sporting goods succeeded.