Garden of the Lost Souls — Jon Erik Olsen

After Flin and Flowell get carried away inside the stomach of a giant jellyfish, Flin stumbles upon a leprechaun village just below the Earth's surface. A magical jadestone keeps this village, called Clover Cavern, alive with magic and hidden from others. This stone was once given to the leprechauns by Flin's great-grandfather, Hovgard Newby, hundreds of years earlier. When this precious jadestone is stolen, Flin is asked by Froggit, Head Leprechaun of Clover Cavern, to find it and save the village from death. While Flin is busy trying to find the stone, Flowell, one of his best friends, gets captured by Blade, an evil threat in the underworld, and must be rescued before it's too late.