Was this ending satisfying for you as a reader? Why or why not?

I like the ending. I think that the ending satisfies some of the narrative left undone and then promises more adventure yet to come. Jacob returns to his own time once more to tell his father that he is leaving, and brings his peculiar friends as proof that everything Grandpa Portman used to tell him was the truth. Then, he and the children sail away from the island, using a map of all existing time loops as their only guide.