All branches of the Chattahoochee Valley Libraries will be closed Monday for the system's annual in-service day, when staff receive training in new technologies and services, a news release says.

Also on Monday, Polaris, the libraries' online catalog and inventory management system, will undergo security and service upgrades, so it will be unavailable for patrons during the day. Polaris is expected to return to operation by Monday evening, the release said.

The branches of Chattahoochee Valley Libraries are:

• Columbus Public Library

• North Columbus Public Library

• South Columbus Public Library

• Mildred L. Terry Public Library

• Cusseta-Chattahoochee Public Library

• Marion County Public Library

• Parks Memorial Public Library