Alexa Alemanni and Joe Boothe have signed on to write Anna Camp’s thriller “The Serpent’s Bite,” Variety has learned exclusively.

Camp will star in and co-produce the film adaptation of the Warren Adler novel for Grey Eagle Films.

Alemanni and Boothe have been on the writing staff of TNT’s “The Librarians” and are about to go into production on “Grief Camp,” with Alemanni starring. Alemanni is best known for her role as Allison, the secretary to Jon Hamm’s Don Draper character on “Mad Men.”

Camp’s credits include the “Pitch Perfect” movies and “The Help,” as well as the shows “True Blood” and Amazon’s new series “Good Girls Revolt.”

Adler is best known for the novel “The War of the Roses.” Kathleen Turner, Michael Douglas and Danny DeVito starred in the 1989 movie adaptation.

“The Serpent’s Bite” centers on a father attempting to reunite with his older children during a nostalgic horse trek through Yellowstone. The story explores how an obsession for celebrity and blind ambition can distort familial love and turn a beloved child into a grotesque monster.

“I am beyond excited to have Alexa and Joe on board,” Camp said. “They work seamlessly as a team and are highly skilled at capturing the essence of character and detailed story development. To have both a female and male perspective is beneficial for our story in particular because of the many complex layers of the dysfunctional family that is the star of this tale.”

Camp will portray the adult daughter, Courtney Temple.

Other Grey Eagle projects include “The War of the Roses: The Children,” co-developed by Permut Presentations; “Target Churchill,” co-developed by Solution Entertainment Group; “Mourning Glory,” to be adapted by Karen Leigh Hopkins; “Cult,” to be adapted by Alex McAulay; “Torture Man,” to be adapted by Black List screenwriter Hernany Perla; and “Residue,” to be written and directed by Vondie Curtis-Hall.

Jenny Wood of Elevate Entertainment represents Alemanni and Boothe. Grey Eagle Films Development is represented by Jeff Silberman of KHPS Law.