Patrick "Pat" Hagan was born and raised on the East Coast, and attended college at St. Joseph's in Philadelphia. He worked in data processing between D.C. and New York City, including three years at U.S. Coast Guard Headquarters, D.C. At age 28, he and his wife moved west, relocating in Marin County, California. Hagan went to law school at UCSF Hastings, then practiced as a civil litigation, primarily defense attorney in Oakland, then San Francisco, for 44 years. In addition to the California Supreme Court, Pat was admitted to practice before the United States Supreme Court, four federal circuits, and many other federal and state courts. He has been invited to join numerous honorary legal organizations, published more than a dozen learned legal articles, and received copious awards, including a 2019 recognition as the leading contributor to the expansion of the International Network of Boutique Law Firms. He was active in the Federation of Defense and Corporate Counsel for 31 years, ceasing his law practice at the end of 2019. San Anselmo is Hagan's fourth novel. His first three novels, Sausalito (2020), Mill Valley (2021), and Ross (2023) were also published by ALIVE Book Publishing.