My dog ate.........

I get a call from my friend alex after playing with my dog and doing my homework downstairs in the laundry room and I answer my phone as I walk up stairs. I sit down for 5 minutes before realizing I left my backpack downstairs reveling a torn book with tiny bite marks I was so upset I yelled at my dog but the didn't help at all! All I could do was try and explain to my librarian how my dog ate my book!