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 who joins one of the warrior cat Clans. 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, The Silent Thaw, was released on 29 October 2019.
The Turtles started their rise to mainstream success when a licensing agent, Mark Freedman, sought out Eastman and Laird to propose wider merchandising opportunities for the franchise. In 1986, Dark Horse Miniatures produced a set of 15-mm (approximately 0. 6 inch) lead figurines. In January 1987, Eastman and Laird visited the offices of Playmates Toys, a small California toy company that wanted to expand into the action-figure market. Development was undertaken by a creative team of companies and individuals: Jerry Sachs, advertising agent of Sachs-Finley Agency, brought together the animators at Murakami-Wolf-Swenson headed by Fred Wolf. Wolf and his team combined concepts and ideas with the Playmates marketing crew, headed by Karl Aaronian, vice president (VP) of sales Richard Sallis, and VP of Playmates Bill Carlson.