Sisters of the Traveling Pants 2

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Does anyone know if the movies are following the books? I read them quite awhile ago and I don't remember all the girls meeting up in Greece in the 2nd book. I could be wrong though. Does anyone know if maybe they just tied loose ends in this movie and it will be the end or is their going to be a third one? I'm curious as Blake and America now have hit TV shows if they even have time to do keep doing them.