Porcupine by Meg Tilly

Now you may be wondering why this book is called "Porcupine." You have to read the book to find out, but I'll tell you a little bit. Jack (Jacqulin) Cooper's dad has died in the war in Afghanistan. Her mother takes Jack and her brother and sister to their great-grandmother's place, where she just leaves them there! Will they stay, run away or get kicked out? -Katherine