Why is it always a little bit off?

I just recently started the book, The Soloist, after I saw the movie which I think was a bad idea. I have never read the book first then went to see the movie. Overall, I am not a big reader anyway, but for a class I am currently in I have to read a book of a list the professor gave us and write a report on it.(5th grade all over again)

This book compared to the movie has some pretty large differences in it that any one who can read will spot these quickly. I really wish I could state some of them but just in case someone happens to stumble upon this post, I do not want anyone reading this and having it spoil the movie and or book.

Go see/read it for yourself!