Question: is the show 100 based on a book

Answer: Yes, On May 9, 2013, The CW Television Network announced that the pilot was officially ordered to series for the 2013--14 American television season. The series is developed by Jason Rothenberg, and premiered on March 19, 2014. In March 2017, The CW renewed the series for a fifth season, which premiered on April 24, 2018. And in May 2018, the series was again renewed for Season 6. No premiere date set yet for season 6.