Those Hadid sisters are lit(erary)!

Bella and Gigi are more than just pretty faces. After all, the supermodel siblings have both been recently photographed carrying books. Books! You know, those antiquated, analog vessels of information usually associated with smart people, like Emma Watson.

As Vogue reports, Bella is deep in the throes of Stephen King’s “The Outsider,” a 560-page thriller that she’s been toting around for “weeks,” even using it as a shield against paparazzi at Charles de Gaulle airport during Paris Fashion Week.

Gigi, meanwhile, “has slightly more intellectual tastes,” the glossy notes. The blonde has been seen holding a slim volume of Albert Camus’ “The Stranger,” which, if you never took a high school literature class, is, per Vogue, “a classic that has been on the must-read lists of philosophy nerds and French literature fiends for decades.”

Tres chic!

And like true supermodels, the gals know how to coordinate their outfits to their new brainy accessories.

Bella has shared a photo of the cherry-red “Outsider” book cover alongside a cherry-printed vintage Louis Vuitton bag and has ditched her usual desperately trend-chasing threads for slouchy gray suits and low-key white sneaks.

Gigi has opted for a more fashion-forward spin on “serious dressing” — as befitting someone reading a book beloved by “French literature fiends” — pairing Camus’ existential classic with a deconstructed, slim-fit, chartreuse capris-pant suit and black boots. All she needs is a beret and a clove cigarette and her transformation from fashion influencer to book influencer will be complete!