Brenau University will offer a free presentation by John Muir biographer James Hunt as part of the ongoing “Sense and Sustainability” lecture series at 5 p.m. Wednesday, March 27, in Thurmond McRae Auditorium. Although Muir was best known for his work out West in what is now Muir Woods National Monument and Yosemite National Park, the author’s book, “Restless Fires,” chronicles the 19th century conservationist’s 1,000-mile trek from Louisville, Ken., to Cedar Key, Fla., from 1867-68. “John Muir is one of the most important naturalists and documentary writers of in American history,” said Dr. Rudi Kiefer, the Brenau professor who hosts the lecture series.