is the show 100 based on a book
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.
The 100 (novel series)