In addition to publishing over forty articles, Douglas is the author of two books. One, New Hampshire Practice and Procedure: Family Law is the definitive source for New Hampshire Divorce and family law, and is used by New Hampshire divorce and family law attorneys, and is frequently referred to in New Hampshire Supreme Court decisions. He also authored the New Hampshire Evidence Manual. This evidence book is relied upon by New Hampshire lawyers and courts during litigation, and is cited to by the New Hampshire Supreme Court.