The Book Tunnels is it a Movie?

I read this book called Tunnels and it was really good. Anyway on the cover it said it was soon to be a major motion picture. Is it out yet? And if it is where can I watch it. I have looked it up and there are lots of tunnel movies so I will give you a description of the story. This boy,Will and his father Dr. Burrows like digging tunnels together. Well Dr. Burrows is digging a tunnel in the basement without his son knowing and he all of a sudden goes missing. Will finds the tunnel and goes in it. Chester, Will's friend, helps him. They find a huge city underground and people live there. They get captured by the underground police. (Can't remember what they were called Styx or something) Well Will finds out that his real family is here and that that his real mother smuggled him and herself Topsoil. This is highly against rules so his mother left Will at another family and went in to hiding. Chester is going to be banished to the Deeps that is where Will's Topsoil father is. Will tries to save him and take his underground brother Topsoil. Chester get captured again but Will and Cal, Will's underground brother make it Topsoil. Will and Cal decide there is nothing for them here and go back down. With the police hunting them they decide to go to the deeps with Chester. They manage to make it on the same train as Chester. The train that is taking Chester to the deeps. That's how it ends there is a sequel that I haven't read yet. If you have any information about this movie I thank you greatly. Thanks!