My god!I left somthing in public places!

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Today I went out with my family.I took one of my favorite books (Twilight)with me.At one time ,we sat down and I have a quick read.But then I forgot to put it into my bag!I felt really bad when I find out.The place is quite far away.Idon't think lost and found can help for it only a book anyway.What can I do?5555555555