I read and re-read that book as a kid and strangely have very little memory of it. I remember somewhere near the beginning, when Mole gets lost and stumbled upon Badger's home, and scraped his shin on the doorstop-thing, and I had *no* idea what it was and was fascinated with why someone would keep this razor-sharp thing on their doorstep. XD

And there's bits I remember here and there, especially the "Piper at the Gates of Dawn" chapter.