Dr. Cooper is summoned to a country in Africa to investigate a giant stone that appeared overnight, separating the country's new dictator and his army from other parts of the population. The stone is miles high and wide, so the big question is, who put it there? When Dr. Cooper and his teenage kids, Jay and Lila, end up stranded on the other side of the stone, will the locals be welcoming or try to harm them? Will they discover the secret of the stone before the dictator loses his patience with them?

This installment of the series didn't have quite the excitement of previous books, but it still had its moments. I think the best thing about the story is that it sort of brings Romans 1:20 to life. ("For since the creation of the world God's invisible qualities--his eternal power and divine nature--have been clearly seen, being understood from what has been made, so that people are without excuse.") I may have already said too much, in regards to avoiding spoilers, but I really appreciated the simple faith and thirst for more understanding about God exhibited by "primitive" people in the story.

I think one of the things that bothers readers most about these books is the unrealistic nature of things that happen. I like that Peretti isn't afraid to explore what could happen, even while we know things like this don't really happen much in modern times. Still, he paints an interesting and entertaining picture.

One final note--I listened to the audiobook specifically so that I could hear it read by the author. I love how he does roles like Mr. Henry and even in the movie Hangman's Curse, and I figured the book would be that much better in his own voice. It did not disappoint! I will most likely listen to the rest of the series this way too. ( )

I liked how Dr. Cooper was able to piece together various Bible verses that refer to God/Jesus as a stone or cornerstone and relate them to what was happening in the story and put them into practice. ( )