The movie spawned by this book, namely "The Secret of NIMH," stands on its own as a wonderful work of art, though they fundamentally changed major aspects of the plot and resolution. It also spawned a sequel, "Rasco and the Rats of NIMH," written by O'Brien's daughter Jane. It was a decent story, but was somewhat fanboyish and seemed more like she was trying to live up to him and prove that she could be a good author too.