Would I be able to finish a book in 4 days or less?

I just borrowed To Kill A Mocking Bird from my school libary and the librarian said I have to give it in by Monday or else I'll be charged for it and it's only Wednesday! Is there anyway I can read the book in less than 4 days?!? And no I will not give it up because I love the book! And my friend is being rude and saying I can't read quickly which also peeves me off. Thanks in advance!