The curious incident of the dog in the night-time

This is Christopher's murder mystery story. There are no lies in this story because Christopher can't tell lies. Christopher does not like strangers or the colours yellow or brown or being touched. On the other hand, he knows all the countries in the world and their capital cities and every prime number up to 7507. When Christohper decides to find out who killed the neighbour's dog, his mystery story becomes more complicated than he could ever have predicted.