I didn't think that anything could top his enthusiasm for Andy Wharhol's Colours but it seems that I was wrong!
On the other end of the scale, Ian has managed to totally freak him out with I Don't Bite. At the end of this perfectly pleasant Rod Campbell book, there is a pop out crocodile who snaps your fingers. However, it seems that there has been one snap too many, and now just a glance at the cover sends Nathaniel backing away from it. Opening the book results in tears. I never realised that a book could be so scary.
Needless to say, the proper "scary" books are just really good fun. Here he is enjoying the Scary Sid book: