Cast off! Rick Nautilus is the youngest and coolest adventurer of the oceans - Volume 1 of the exciting series by the bestselling author of "Die ??? Kids" On board the Nautilus, Rick, Ava and Emilio head for an unexplored island. Suddenly they discover a message in a bottle! But it's not a treasure map, it's a call for help. And a cord attached to the bottle leads the three friends deeper and deeper into the ocean ... What secret awaits them down there? What dangers lie in wait for them? The friends absolutely have to find out! With their fantastic submarine, Rick and his friends, the ocean woman Ava and the pirate son Emilio, are on the trail of the most incredible secrets of the oceans. Reading fun in series for all adventurers, water rats and light sailors! With strong pictures by Timo Grubing Already published in the series "Rick Nautilus": Rick Nautilus - Trapped on Iron Island (Volume 2) Coming soon: Rick Nautilus - Alarm in the Dolphin Lagoon (Volume 3) Rick Nautilus - Ghost Ship at the Bottom of the Sea (Volume 4) More volumes in preparation.