Guerin, an editor/author specializing in employment law, is author or co-author of several Nolo books, including The Manager's Legal Handbook, Dealing with Problem Employees, Nolo's Essential Guide to Federal Employment Laws, Workplace Investigations, Create Your Own Employee Handbook, and Nolo's Guide to California Law. Guerin has practiced employment law in government, public interest, and private practice where she represented clients at all levels of state and federal courts and in agency proceedings. She is a graduate of Boalt Hall School of Law at the University of California at Berkeley.