Under the Universe — Karen Hutchins Pirnot

It has been a year since Allie Henderson's galactic cousin Eilla returned to her own galaxy. Allie is eager for an adventure of her own. When she is offered the opportunity to visit Eilla in England in another universe, she packs her bags and prepares for a time travel of her own. Eilla and Allie visit Stonehenge where they discover yet another world of creatures who lead them to knowledge that they and they alone, possess. Just what they will do with that knowledge is anyone's guess. When Allie is to return to the Earth, Eilla has a surprise of her own!