Making up words

Finished reading London Fields by Martin Amis. The book has proved to be a costly read. As my vocabulary is so brilliant I had to use a dictionary alongside it. Much to my horror I would have to stop reading, look up the word and then find that some of the words weren't even in it. I first thought that this was because he was either using very obscure words that even my dictionary didn't know, or even worse, making words up! Then I realised that my dictionary was printed in the early eighties and this could account for its lack of knowledge. I've ordered a new one.