Conversation so far:
when does season 6 of the hundred start
Season 6 of The 100 began April 30, 2019.
when did the first show of the 100 air?
The very first episode of the The 100 aired 3/19/2014.
is the 100 show based on a book?
Yes, The 100 TV series is based on a series of young adult science fiction novels by Kass Morgan also titled The 100.

Question: who wrote the book?
Self-contained rewrite: who wrote the 100 novel series?