"Chapters in books are usually given the cardinal numbers 1, 2, 3, 4, 5, 6 and so on. But I have decided to give my chapters prime numbers 2, 3, 5, 7, 11, 13 and so on because I like prime numbers.
     This is how you work out what prime numbers are.
     First you write down all the positive whole numbers in the world. Then you take away all the numbers that are multiples of 2. Then you take away all the numbers that are multiples of 3. Then you take away all the numbers that are multiples of 4 and 5 and 6 and 7 and so on. The numbers that are left are the prime numbers.
     The rule for working out prime numbers is really simple, but no one has ever worked out a simple formula for telling you whether a very big number is a prime number or what the next one will be. If a number is really, really big, it can take a computer years to work out whether it is a prime number.
     Prime numbers are useful for writing codes and in America they are classed as Military Material and if you find one over 100 digits long you have to tell the CIA and they buy it off you for $10,000. But it would not be a very good way of making a living.
     Prime numbers are what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them" (11-12).

I chose this passage because when I first picked up the book, I was really freaked out about the fact that there was no chapter 1. I spent about 5 minutes flipping through the book to find chapter 1, then resigned myself to the fact that it doesn't exist. This passage makes it pretty clear that Christopher has a very, very different way of thinking about things. Who would think to use prime numbers in order to order something? It would be like starting a worksheet with problem 0. This shows a very unconventional way of thinking about things and a very different sort of logic that goes on in Christopher's head