When my family got our first VCR, the first 2 movies we rented were the Dark Crystal and the Secret of NIMH. I thought it was a great movie, but years later I got the book, Mrs. Frisby and the Rats of NIMH, for my younger brother. I read it to him when he was about 6, and I discovered that the book is far superior to the movie, having superb background and description, and presenting the dilemmas in real and difficult terms, instead of the simplistic magic and clear-cut good and evil of the movie. I recommend this book as an intriguing children's adventure story, and worthwhile addition to any library of children's literature.