Kendall and Kylie Jenner are releasing a sequel to their novel.

Kendall and Kylie's new book, 'Time of the Twins', co-written with Elizabeth Killmond-Roman and Katherine Killmond, will be released on November 15.

Kylie, 18, said: "In our first book, 'Rebels: City of Indra', we left Lex and Livia in a place where their future was uncertain. Now, in Time of the Twins, you’ll learn how these sisters struggle to get to know each other and deal with their fate."

Kendall, 22, added: "We are so happy to be able to continue the story of Lex and Livia in 'Time of the Twins' with Regan Arts. We love this world and these characters. It’s been so fun to tell their story and we are excited to share it with our fans."

A synopsis on publisher Regan Arts' website says: "'Time of the Twins' follows the story of Lex, a rebellious orphan, and her twin sister, Livia, a pampered heiress, as they make a grueling journey in search of the mother they thought was dead. But their journey is just the beginning. They will have to face an ancient prophecy that calls them the long-awaited 'twin saviors,' destined to save their city of Indra and all of its people. It’s a responsibility they never asked for, but one that may prove impossible to deny."

Speaking previously about their first book, Kendall admitted it was influenced by people in their lives but the characters were not directly based on anyone she knew.

She said: "I don't think we tried to directly relate anybody to anybody, but there are definitely characters that are similar to people in our lives."