The NOLO books listed below are great resources and are easily available but they are not about New Hampshire law. Use them for an introduction to the topic and then verify the information with New Hampshire resources.
Please remember that this guide is for information purposes only and is not comprehensive. It is intended as a starting point for research, to illustrate the various sources of the law, and to provide guidance in their use. NH Law About ... is not a substitute for the services of an attorney.