Diez-Cuatro or 10-4 is written in such a way to aid persons that encounter Spanish speakers daily while performing their jobs. Although it is aimed toward law enforcement in many of the phrases and scenarios, it can be used by other emergency personnel as well. For instance, one scenario goes from a traffic stop to arrest and then to booking the arrestee into corrections.
Another scenario refers to and accident, where medical questions come into the scene which aid not only the law enforcement but medical and other first responders as well. Then onto the emergency room to make sure the necessary information that the medical personnel need is given.
There are alert words included that could save your life, because you are at a disadvantage when dealing with a subject that means to harm you and you can't understand what he is saying to his 'paisano' or countryman. The included glossaries at the back of the contain many words that you use in the legal and medical field.
Unlike most phrase books, this book starts out with the basics, such as the alphabet, the eight parts of speech, (nouns, pronouns, adjectives, etc.) to help the reader understand why we say the phrases the way we do. The pronunciation is written out in italics for many of the phrases to aid the beginner as he or she works to become more fluent in the Spanish language.