Books Vs. Movies

I have read three childrens picture books based on movies.  The Little Mermaid, Junglebook, and Tarzan are the books I've read.  They were all published in a series of children's picture books and sold as a set.  I read the books to my children all the time but the movies are by far much better.  The books are short picture books which makes the bulk of the plot seemed very rushed.  Each book had to leave out many exciting adventures of the stories because of the limited space for subject matter.  Many details were omitted in the books, some that were fairly significant in the movies.  The authors of the picture book series should have expanded the length of the books to include many more details for the audience to enjoy.