The Friends of the Deep Valley Libraries is a 501c3, non-profit organization. The Friends serves as the fundraising arm of the Blue Earth County Libraries in Mankato, Mapleton, and Lake Crystal, Minnesota. The organization's EIN is 41-1309566.

Our Mission: 
The purpose of the organization shall be to maintain an association of persons interested in assisting and supporting libraries in Blue Earth County, and to focus public attention on library services, facilities needs, and to promote literacy.