"This book is an introduction to the vast body of law that governs real estate transactions in California. It will not, however, qualify you to give legal advice, which would be the unauthorized practice of law. Rather, it will help you recognize situations in which legal counsel should be sought and help you understand rights and obligations under the law."
-A random textbook I ran across
Sounds a lot like the common and cliched halachic warning: "Do not use this sefer as a practical guide; in any real situation you must first consult your posek and he will tell you what to do."
Apparently, great legal systems work alike.