With the help of rising entrepreneur Chris Whittle, Testerman came up with an updated downtown redevelopment plan, the "1987 Downtown Plan." This new plan called for further renovations to Market Square and the beautification of Gay Street. Victor Ashe, Testerman's successor, continued redevelopment efforts, focusing mainly on parks and blighted areas of East and North Knoxville. As the city's westward expansion along Kingston Pike had been thwarted by the incorporation of Farragut as a town in 1980, Ashe, rather than focus on large-scale annexations, turned instead to "finger" annexations, which involved annexing small parcels of land at a time. Ashe would make hundreds of such annexations during his 16-year tenure, effectively expanding the city by over 25 square miles. Preservation efforts in Knoxville, which have preserved historic structures such as Blount Mansion, the Bijou Theatre, and the Tennessee Theatre, have intensified in recent years, prompting the designation of numerous historic overlay districts throughout the city. The efforts of developers such as Kristopher Kendrick and David Dewhirst, who have purchased and restored numerous dilapidated buildings, gradually helped lure residents back to the Downtown area. In the 2000s, Knoxville's planners turned their focus to the development of mixed residential and commercial neighborhoods (such as the Old City), cohesive, multipurpose shopping centers (such as Turkey Creek in West Knoxville), and a Downtown area with a mixture of unique retailers, restaurants, and cultural and entertainment venues, all with considerable success. In 2020, March 23, Knoxville businesses were shut down due to the COVID-19 pandemic. The East Tennessee Historical Society's annual journal, published since 1929, contains numerous articles on Knoxville and Knoxville-area topics. The Society has also published two comprehensive histories of Knoxville and Knox County, "The French Broad-Holston Country" (1946), edited by Mary Utopia Rothrock, and "Heart of the Valley" (1976), edited by Lucile Deaderick. In 1982, the Society published a follow-up to "Heart of the Valley", William MacArthur's "Knoxville: Crossroads of the New South", which includes hundreds of historic photographs. Other comprehensive histories of the city include William Rule's "Standard History of Knoxville" (1900) and Ed Hooper's "Knoxville" (2003), the latter being part of Arcadia's "Images of America" series. The Civil War is one of the most extensively covered periods of Knoxville's history.