Gal take care of your book

Yeah this gal has simply put her book on table and saying my son took her book. Oh well he did and I told the mother he would give back her on Monday since it's already Friday night. She didn't get to do her work today because missing the book.

Son also no idea taken the book, he didn't see the name. He says the book on his table so he just put inside bag. :(

He's just started primary one and he's trying to cope with his classmate and environment.