This handbook for Trustees of the Wisconsin Public Library describes in detail the tasks involved in being a library trustee. The handbook comprises a number of "Trustee Essentials" that cover the basic essential information needed by Trustees, as well as sources of additional information. Contents include: The Trustee Job Description; Who Runs the Library?; Bylaws--Organizing the Board for Effective Action; Effective Board Meetings and Trustee Participation; Hiring a Library Director; Evaluating the Director; the Library Board and Library Personnel; Developing the Library Budget; Managing the Library's Money; Developing Essential Library Policies; Planning for the Library's Future; Library Standards; Library Advocacy; The Library Board and the Open Meetings Law; the Library Board and the Public Records Law; Ethics and Conflict of Interest Laws Applying to Trustees; Membership in the Library System; Library Board Appointments and Composition; Library Director Certification; The Library Board and Building Accessibility; The Library Board and Accessible Services; Freedom of Expression and Inquiry; Dealing with Challenges to Materials and Policies; Library Friends and Library Foundations; Liability Issues; The Public Library System Board--the Broad Viewpoint; and Trustee Orientation and Continuing Education. The following Trustee Tools are appended: important state and federal laws pertaining to public library operations; library system map and contact information; Division for Libraries, Technology, and Community Learning contact information; and a glossary of terms and acronyms. (AEF)