Courier Corp., the publicly traded, Massachusetts-based book publishing giant, is relying on Joele Frank for PR support amid a burgeoning acquisition battle.

Courier, the second largest book maker in North America, on Jan. 16 inked a $260M merger agreement with Quad/Graphics, the $5B global printing company that wants Courier's digital publishing savvy. But RR Donnelley & Sons stepped in this week with an unsolicited, $23-per-share bid, trumping Quad/Graphics' $20.50 pitch.

Courier's board, which approved the Quad/Graphics deal, said the RR Donnelley offer would "likely" be deemed a superior proposal, although its determination is not yet complete.

Joele Frank managing director Averell Withers counsels Courier on the PR front.

Claire Ho directs corporate communications for Quad/Graphics.

Chicago-based RR Donnelley has not commented publicly on its bid.

Courier posted fiscal 2013 revenues of $275M with net income of $11.2M.