Although divorce is usually a state matter, there are aspects that are affected by federal law. These Congressional Research Service Reports and federal websites discuss some of those issues.
Many of these print publications have form examples. All are available at the Law Library or can be borrowed.
A Practical Guide to Divorce in New Hampshire by 
Family Law by The books listed below are all continuing legal education titles that are written by lawyers, for lawyers. These books tend to be practice-oriented with information that might not be found in more scholarly treatises. There's usually a detailed table of contents, but no index or other finding aids. Quality can by inconsistent; some are no more than outlines or Power Point slides but others are very detailed.
Top Challenges in Family Law
Advanced Issues in Family and Divorce Law
Small Business and Divorce by Tax Issues in Divorce : and We Will Still Talk About Alimony by 
Nuts and bolts of family law : a continuing legal education program. by 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.