Supposedly an adaptation of the Three Billy Goats Gruff fairy tale, it does have a couple of elements of that half-heartedly thrown in, but this is really a slightly revised version of The Sontaran Experiment. The author doesn't even try to hide what I can only assume can be considered plagiarism. Maybe he had persmission, I don't know. I also just don't know why. I guess the idea is that you could read this to a small child. I'm not sure what lesson they're supposed to take from the protagonists killing their foe and then laughing on the way home without a care in the world, but that seems to be the message in the original fairy tale as well. None of the billy goats ever asked "Do we have the right?"