Courier Corporation (Nasdaq: CRRC), one of America's leading innovators in book manufacturing, publishing and content management, announced today that it has received a non-binding, unsolicited proposal from R.R. Donnelley & Sons Company (Nasdaq: RRD) to acquire the Company for $23.00 per share in cash or RR Donnelley common stock, subject to proration in the event that shareholders elect to receive more than approximately 49% cash or more than approximately 51% stock. The RR Donnelley proposal is subject to, among other things, various closing conditions, Courier shareholder approval and regulatory approvals.