"Game of Thrones" did it. So did "Pretty Little Liars." Don't forget about "Gossip Girl," "Perry Mason" and, yes, "Lassie" -- to name a few. There have been many successful TV series that were based on books...so how come your phone isn't ringing yet? Why isn't your book on TV?
A Million Screens
Even back when there were just three channels on the TV, network execs couldn't figure out enough ways to fill the hours. Many television stations went off the air to show absolutely nothing during the late-night hours. Some stations still do this, but now they just show commercials. Today there are more TV channels than ever, so there's more opportunity than ever for a writer to create a story that can be turned into a TV show. Your phone should start ringing any day, now.