Family adventure “The Library” is headed for the bigscreen with Brett Ratner’s Rat Entertainment partnering with Artist Intl. on a feature version of the Zenescope Entertainment comicbook.“The Library,” an original idea by Zenescope’s Joe Brusha from Zenescope’s Grimm series, follows the adventures of a young girl who, along with her family, unlocks a portal in a historic and forgotten library, bringing heroes, villains and creatures from storied books into our world while also transporting the family to their time periods. Ratner will produce. Rat Entertainment’s John Cheng, Zenescope’s Brusha and Ralph Tedesco and Artist Intl.’s Dave Brown are exec producing. “‘The Library’ is perfect for us here at Rat Entertainment, where our focus is to find and develop material with a unique sensibility, connecting and transporting audiences,” Ratner said. Rat Entertainment’s recent films include “Horrible Bosses” for New Line and “Mirror Mirror” for Relativity. The banner recently acquired “I Want My MTV,” with Jimmy Miller to develop at Sony Pictures. Ratner is prepping to direct “Hercules,” starring Dwayne Johnson, for MGM. Zenescope’s “The Piper” is in development with Mandalay Vision as a modern day horror retelling of the Pied Piper story, and its “Monster Hungers Survival Guide” has been set up at Simon Kinberg’s Genre Films.