This novel was fun enough to listen to on audio (although Jesse Bernstein's accents grated on me after a while). It's an interesting idea, but the execution wasn't as skillful as I would have liked. I like stories that are seamless, and I felt at several points that I could see how it was constructed, as though Riggs hadn't sewn the pieces together as invisibly as he might have. 
 Would a kid from 21st-century Englewood, Florida, use the word "save" to mean "except"? Would he recognize at a glance that a fish was a cod or a salmon (cold-water fish that I'm pretty sure aren't caught in Florida)? I'm doubtful of both of these. Also, I'm not a fan of the adjective "inky" to describe darkness, and to have it appear more than once in the same story set me to eye-rolling. 
 I guess I would have liked Riggs to put in a little more effort into making this story seem effortless. I'm unlikely to read more in the series unless my children express an interest and I want to see what they're reading.