The books most sought are histories. Nineteenth century histories of Delaware, like those by Scharf or Runk, fetch hundreds of dollars in good condition. Histories written in the 20th century by Conrad, Bevan, or Reed bring almost as much. But most collectors enjoy the more popular histories. The many books by the late C.A. Weslager are favorites.
Pictorial books are especial favorites of collectors.
Histories of Delaware towns are popular, especially down state in Kent and Sussex Counties. There are plenty. Half a dozen histories of Milford and Lewes exist. By comparison, there are only a few good histories of Wilmington and none of Newark. Cooch's History of Newark, Delaware, and Its Environs is the story of 1930's automobile rambles and contains little real history.