Credit: Instagram

Kylie and Kendall Jenner may still be in their teens, but it looks like they’re already well on their way to becoming moguls!

Sixteen-year-old Kylie and 18-year-old Kendall, who already boast an impressive body of work as models, clothing and accessory designers, and reality stars, are now published authors, as well.

The Keeping Up With the Kardashians stars just released their first novel, Rebels: City of Indra, and, if we were the types to judge a book by its cover, we’d say it looks pretty darn awesome. The black and white cover bears the striking image of a heavily-lidded eye peering out just above the book’s title.

While the girls seem pleased with their efforts, their famous family members couldn’t be more proud.

Khloe Kardashian have her little sisters a shout-out on Instagram, showing off the book cover alongside the caption, “I’m so proud if my sisters!!! Congrats my babies on your book.”

“I am a proud older sister! They make me so happy. They wrote a book!” added sister Kourtney.

Even their reclusive big brother, Rob Kardashian, who has been caught in the midst of a family feud over the past few weeks,  chimed in with his support, re-tweeting Kylie’s status about the book’s release and posting a photo of the novel’s cover to his Twitter.

Will you read Kendall and Kylie’s book?

Sources: Khloe Kardashian on InstagramKourtney Kardashian on InstagramRob Kardashian on Twitter

Credit: NDN Photo: Kendall and Kylie Jenner Break Into the Book World (VIDEO)