The Shelters Of Stone (Earth's Children, Book Five) - Jean M. Auel Basically I have say the same I said for The Plains of Passage, too much sex we don't need it so often and we are not idiots, you do not need to repeat a bunch of info from the rest of the series or from earlier in the book. But I still like the the series, but if you want the true soul of the series read The Clan of the Cave Bear.