This is a good book. It hooks you in from the first and takes you along until the end. I found myself not wanting to stop the story. It is clean (no..Show More » language and nothing steamy). I've heard others write about "world building" but never really realized what that fully meant until this book. If you like adventure books this is for you.
I just can't get past Nat taking Cal along with her in Fourline when the portal was right there. the author should have found a way for Cal to come a..Show More »long that made more since. An example would be that when Cal crossed, there's Nala and they must run and fight them off. By the time they are safe, they are too far from the membrane to turn back. I don't understand why the author felt Cal needed to cross into Fourline, except to be a major pain to all the other characters, but if she really wanted Cal to be there, she should have found a better way to write it.