Is there anything a child from the Kardashian-Jenner family WON'T do?! Youngest children Kendall and Kylie Jenner announced their latest endeavor on Wednesday -- and it might surprise you!

The sisters told E! News that they will be writing a novel together aimed at a young-adult audience. The whole idea started when the girls discussed and wrote up notes about what type of movie they'd like to star in. Their co-manager helped them get in touch with the right people to get the ball rolling and the idea turned into them writing a book.

Kendall and Kylie Jenner at MS Charity Event

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The book is likely to be the first of a series and a science fiction story that is set far in the future. The girls say they hope to have the book out by next summer and are surprised by how fast the process is moving so far.

Of course, Kendall and Kylie aren't the first published authors in their family. Mom Kris Jenner wrote a tell-all memoir (that landed her in some hot water with her family) and Kim, Kourtney and Khloe Kardashian wrote a fictional novel together last year, too.

What do you think Kendall and Kylie should take on next?!

Photos Courtesy of: Fame/Flynet