The Eager Free Public Library was the first of a series of Prairie School libraries designed by the Madison firm of Claude & Stark . Louis W. Claude had previously worked for two well-known Chicago firms, Adler & Sullivan and Burnham & Root. He was also a longtime friend of Louis Sullivan and Frank Lloyd Wright. The Prairie School design of the Eager Free Public library demonstrates these influences.

The two story building is constructed of dark red brick topped with a horizontal stone band and surmounted by a elaborately ornamented terracotta panels in the style of Louis Sullivan. The Prairie School influence is seen in its low, horizontal appearance and spreading hip roofs. The entrance vestibule, framed by two octagonal engaged columns, is balanced by projecting triple bay windows on either side. On the side elevations ribbon windows were built above the built-in shelving of the interior in order to let light in. The rhythmic grouping of these windows is enhanced by the geometric patterns in soft-colored leaded glass.

There are two sculptures inside. The first is a plaster bust of Edward Searing, a Rock County teacher and nationally known writer of classical textbooks. The other is a life-size bronze of the library donor, Almeron Eager. Eager was a general merchandiser and tobacco dealer. Along with A.S. Baker, he organized Baker Manufacturing Company, a nationally know manufacturer of windmills and pumps. Eager was also the president of the Evansville Village Board and a member of the Rock County Board. Upon his death he left $10,000.00 in his will for the erection of a public library building.

The library is still in operation and is open during regular hours.