This story is narrated by a rat, who is pleased that two different coloured cat gangs are fighting each other because it distracts them from rat catching. Then a ginger cat and a black Tom fall in love. Their families are appalled and they are banished. However, when they return they have a family. What now? This book is a striking combination of bad cats and a rubbish dump setting with pictures in Butterworth's fresh-faced appealing style, black pages with contrasting clean white writing, that doesn't feel the least bit threatening. It's a very good story in its own right with an ending, a stripy kitten named Tiger, that my children love and find funny. It is a bonus that the book can be used to lead on to discussions about external differences, prejudice and so on. Another good book that also illustrates this message well, if you're a fan of the zany Dr Seuss, is The Sneetches.