Several hundred fans filled the Mall Of America Rotunda yesterday to purchase a copy of Kendall and Kylie Jenner's new book, Rebels: City Of Indra. Each fan also received a wristband to get the book autographed by the 2 youngest installments of the Kardashian family.

The book is a fiction piece penned by both of the youngest girls in the Keeping Up With The Kardashian clan. The story takes place in the distant future, telling the story of two girls from drastically different backgrounds that share a common destiny.

After the signing/meet and greet session, the Jenners had enough time to hit up a few rides in Nickelodeon Universe. Being escorted by several members of Mall Security, they rode the Avatar and the Sponge Bob Rock Bottom Plunge rides. Although Kendall clearly was the fan favorite, they both seem to be on the fast track to stardom all on their own.

Photos by Tommy Williams Photography