There are basically two different types of people:  those who love cats or those who love dogs.  In The Pet Wars Otto and his older sister Lexi are at war with one another.  Lexi wants a cat and Otto wants a dog.  Their mother decides that whomever earns $500 first will get to buy the pet of their choice.  Lexi is pretty bright, not only at school, but very clever as well.  She starts up a tutoring program with the help of her teachers who recommend to failing students that they hire Lexi to help them study and before long she is raking in the money.  Otto is totally off the wall and really cannot come up with a moneymaking plan.  All of his ideas cost him money and are actually very funny (from an adult perspective–I’m not sure if kids will get the humor).  Until he hits on a dog-walking business.  Now, this would be a terrific business for him if he were somewhat organized and responsible.  But Otto is the total opposite of Lexi and he is always scrambling to make it right.  This is a story that kids who love pets will love regardless if they are a cat lover or a dog lover.