Lost book

For a whole week, we have looked for a lost library book.  In her bed, in the car...all the cars.  Emptied her backpack, tore up our bookcases, and play room to no avail.  Ava was devastated so we were prepared to buy the book to replace it for the school and then Ava sat on it in the car.  Literally.  I can't make this stuff up.