Mo. Rev. Stat. § 182.610

Two or more county library districts having the same rate of taxation on assessed valuation of taxable property within each district may join in creating a consolidated public library district, which shall have the same rate of taxation as districts forming the consolidated public library district, shall have the powers and authority as set out in sections 182.610 to 182.670, may perform any common function or service, including the purchase of land, and the purchase, construction and maintenance of buildings and any other property and may join in the common employment of any consolidated public library district officer, librarian or employee.