I bought the book for $3 and it may have been too much. If you were awake during 3rd grade science class you have already seen these "sneaky" things. Most of it is common sense, for instance, this gem:Use ordinary objects as "sneaky" weapons:You can throw a handful of coins at an attacker's face to stun and throw him or her off balance.And believe it or not they have an illustration (see figure 1) just in case you forgot how to throw a handful of coins. What a magnificent "sneaky" weapon.