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Bod's beginning to see the ghosts less and less to the point where he cant even see them at all. Which means he is growing up and he is loosing his child qualities. It's time for bod to leave the graveyard and live in the world on his own. Bod decides he is going to explore the world and "leave no path untaken". If there is a second book being written i believe Bod will return to the graveyard and he will see Silas again. Atleast i hope he does. After all this is the beginning of a wonderfull life for Bod. What do you think Bod will do in the future?