A group of authors who have written a book about famed landscape designer Frederick Law Olmsted’s impact on Brookline will give a talk and book signing at Newbury College next weekend. The co-authors, Keith Morgan, Elizabeth Hope Cushing, and Roger Reed, have written “Community by Design: The Olmsted Firm and the Development of Brookline, Massachusetts,” published by the University of Massachusetts Press in association with the Library of American Landscape History. Olmsted, who designed Central Park in New York City, moved to Brookline in 1883 and set up his office, Fairsted, which is now a national park. With funding from the National Park Service’s Frederick Law Olmsted National Historic Site, the authors researched Olmsted’s firm and its role in shaping Brookline neighborhoods, institutions, and transportation networks at Newbury College in the Fisher Hill neighborhood that was designed by Olmsted. The book signing will be held at 3 p.m. Saturday in the Newbury College student center at 129 Fisher Ave. More information can be found at www.friendsoffairsted.org.