Although much of the information in this book is available on the internet, you can't find it unless you know what your looking for. This book covers a very broad range of federal, State and local law enforcement organizations, from the well known to obscure. Each having a small 2-10 page section on the agencies history, positions and duties, and requirements for employment. Some examples of organizations covered are the FBI, DEA, ATF, Bostan PD, and also smaller ones like Department of State Security, ICE, and Park Rangers. Yes they have special agents too. Of course if you know which agencies interest you then definitly find a more specialized book. But if your like me and want a more general preview then this is a well spent 15$.