6 decades books

As humans will sometimes do upon discovering a multi-dimensional artefact--and call it Lovecraftian if you so desire--they will go about mucking with it. In this instance, this results in a seemingly innocent girl being sucked away from your miserable planet. Yes, your planet--but some time in the future. The girl then becomes a pawn for extremely powerful entities who send her to yet another miserable world infested with humans.