With very public social media profiles, from constant Snapchats to multiple Instagrams posted per day, plus the many, many public appearances at red carpets, store openings, and random sightings while out and about in Los Angeles, New York, and pretty much everywhere around the world, you’d think there’s not much left to discover about Kendall and Kylie Jenner.

However, the sister duo took to the website of their new book, The Time of the Twins: The Story of Lex and Livia ($11; amazon.com), Wednesday to test their longtime creative director Liz Killmond on some of their most personal details, giving their fans a taste of their everyday life along the way.

VIDEO: Kendall & Kylie’s Cutest Sister Moments


“Who gets up earlier? Who’s more likely to have a midnight snack?” Kylie wrote on the site. “We quiz our long-time Creative Director Liz Killmond—and a co-author of our new book, Time of the Twins—on her Kendall and Kylie knowledge.”

RELATED: Kendall and Kylie Jenner Get Shady with New Eyewear Line

Watch the video above for a look into the inner lives of the Jenner sisters, and perhaps even learn a few things about them you never knew before!

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