ARC graciously provided by the author

**SPOILERS***

Gabriel and his friends Peter and Misty are attending the Nemo Institute, and during Dr. Nemo's marine biology class, a large vessel approaches the school and sends out an SOS. Of course, Gabriel and his friends take off in the Obscure to help, only to find it was a trick and that a double submarine is attacking the Institute! They return to find out that Gabriel's mother has been kidnapped, and his father's vessel had been attacked earlier. The organization responsible for the kidnapping is Maelstrom, which had been an adversary of the Nemo family historically, but even Gabriel's father had never had to deal with them. Maelstrom demands an old Nemo artifact, the Dakkar's Eye. This was apparently a source of endless power that Captain Nemo made and was going to donate to the people of Brazil, but the Nautilus was lost in 1910 and never delivered it. Gabriel's dad decides they can never find it in the four days allotted, and retreats to his lab to make a fake one, but Gabriel and his friends track down an obscure journal from the expedition to try to find the missing ship. Of course, once they manage to track down the journal and liberate it from Boutros' USS Alaska, they find out that it is entirely in code! Luckily, it is a Nemo code, and Peter is able to translate it. According to the account, the Dakkar's Eye is highly radioactive, and was on a ship last seen near Gilbert. But is it Gilbert Island, or the Gilbery Trench? Since the island is closer, in the Pacific, the group sets out, only to meet government forces who are also investigating what looks like the buried wreckage of a submarine. Unfortunately, this isn't the one they want, and Antarctica is too far of a journey. Luckily, Peter comes up with a way to allow them to travel much faster, and the group manages to find the Nautilus in an ice cave. Will Gabriel be able to retrieve the power source and get it to Maelstrom in time to save his mother?
Strengths: Henderson constructs the perfect middle grade novel. We head right into the action, with pauses for breath and description at good intervals. I love the fact that Gabriel and his crew, while they take off on insane dangerous missions, still ask for permission and do safety checks of their equipment! The details about submarines and underwater environs are fascinating, and working in the history of the Nemo family is a nice touch. I enjoyed this one a lot and can't wait for the next one!
Weaknesses: It is a little hard to believe that the entire Nemo clan couldn't solve the mistory of the wrecked Nautils, but Gabriel could. But then, tweens can save the entire world from evil forces of destruction more quickly than I can find my car keys, so there's that!

What I really think: I love this series. It's so full of detailed but fast paced adventure, and my students recommend this to their friends after reading it. I have about four students who want the ARC when we get back from winter break! I also adore Henderson's Alex Van Helsing series, which is similarly action packed. It's still available in hardcover from Follett's Titlewave!