<Li> Dirk Gently (2010, 2012) starred Stephen Mangan in the title role in a TV pilot broadcast on BBC4 in late 2010 and subsequently for a series of three episodes, broadcast in early 2012 . </Li> <Li> A five - part comic book series began in May 2015 by IDW . It uses the Dirk character, but new stories . </Li> <Li> Dirk Gently's Holistic Detective Agency (2016): in January 2016, BBC America ordered the production of eight episodes for a new TV series written by Max Landis and starring Samuel Barnett as the titular character, along with Elijah Wood as Todd and Hannah Marks as Amanda Brotzman, Todd's sister . </Li>

How many books in the dirk gently series