The book is "How to Steel a Dog" written by babara o'connor.
11yesrs old Jorjina, sleeps in the car with her mother and younger brother Toby, washes at McDonald's, and wears the same clothes every day. Not long ago, there was a house where she and her family lived with her father, but they have been living like this since her father abandoned her family and ran away. They had to solve everything in a space called the back seat of the car, she makes plans with her younger brother. The plan was to steal the dog and take it back if the owner paid a reward of about $500. She and her brother finally steal the dog and feed it.

If you are curious about this next story, I recommend this book to you.