a day as someone else

you decide that breaking into the library is the best thing to do at the moment, after all, your parents wont believe that their son is now their daughter. as you come up to he library steps, the door is wide open, this is gonna be easier than you thought! whe you get inside, you can hear people in the staff room talking. carefully sneaking back to where you found the book you start looking around for it. thats when you remember that you never put the book back, you left it out on the reading chairs. but there arent any books on them now. what to do?