There are currently seven sub-series, each containing six books except for the seventh sub-series, which is currently in progress. The first, Warriors (later re-titled Warriors: The Prophecies Begin), was published from 2003 to 2004, and details the adventures of a housecat named Rusty, who joins one of the warrior cat Clans, ThunderClan. Warriors: The New Prophecy, published from 2005 to 2006, follows the first sub-series, chronicling the Clans' journey to a new home. The third story arc, Warriors: Power of Three, was published from 2007 to 2009, and centres around a prophecy about three cats with extraordinary powers. The fourth sub-series, Warriors: Omen of the Stars, was published from 2009 to 2012 and continues the story arc of Warriors: Power of Three. The fifth sub-series, Warriors: Dawn of the Clans, was published from 2013 to 2015. This prequel series arc details the formation of the Clans. The sixth sub-series, Warriors: A Vision of Shadows, was published from 2016 to 2018. Chronologically, Warriors: A Vision of Shadows follows Warriors: Omen of the Stars. The seventh sub-series is entitled Warriors: The Broken Code. The first book in the seventh series, Lost Stars, was released on 9 April 2019. The second book in Warriors: The Broken Code is titled The Silent Thaw. The third book in the series is titled Veil of Shadows and the fourth book, Darkness Within is released and the fifth books, The Place of No Stars have not been released yet. A sixth book for the seventh series has yet to be revealed and released.