Hillsdale college's monthly journal has an article with the head of Walden that explains it. Very good insight as to the company's future release plans:
http://www.hillsdale.edu/imprimis/
Good link, here's an excerpt,
"...Our project has opened up a fair debate about whether children should read books that have such frightening content. C. S. Lewis tackled this issue head-on and offered some good advice that informs how we select our projects:
Those who say that children must not be frightened may mean two things. They may mean (1) that we must not do anything likely to give the child those haunting, disabling, pathological fears against which ordinary courage is helpless: in fact, phobias. His mind must, if possible, be kept clear of things he can’t bear to think of. Or they may mean (2) that we must try to keep out of his mind the knowledge that he is born into a world of death, violence, wounds, adventure, heroism and cowardice, good and evil. If they mean the first I agree with them: but not if they mean the second. The second would indeed be to give children a false impression and feed them on escapism in the bad sense. There is something ludicrous in the idea of so educating a generation which is born to the…atomic bomb. Since it is so likely that they will meet cruel enemies, let them at least have heard of brave knights and heroic courage. Otherwise you are making their destiny not brighter but darker.
In February we release two films. Our first, Bridge to Terabithia, follows our traditional model of a film based on a popular book—in this case Katherine Paterson’s Newbery Award Winner..."