Lucy and Andy are Neanderthals--and siblings, much to their eternal dismay. Andy desperately wants to go on a hunt (though he's too young and goofy). Lucy desperately wants people to listen to her (and she's usually right). It's a fun story featuring lots of elements of Neanderthal life--with two scientists jumping in between chapters to clarify the facts. 
 A fun comic for elementary schoolers, maybe middle schoolers. I read this from an ARC I picked up at ALA, so the art isn't final, but if you know Jeff Brown's style from the Darth Vader & Son books, you have a good sense of what this looks like.