Alistair Grim’s Odd Aquaticum (Odditorium Book 2)

Grubb, a former orphan and chimney sweep, has become an apprentice to Alistair Grim at the Odditorium, a mechanical marvel. Though Grubb's life has transformed, he must remain hidden, as London believes Alistair Grim is a villain planning mass destruction. Grim's true goal is to expose Prince Nightshade, a necromancer who seeks to steal the Odditorium's power source. To stop Nightshade, Grim, Grubb, and the Odditorium's crew must locate the legendary sword Excalibur—the only weapon capable of piercing Nightshade's enchanted armor. Their search leads them on an extraordinary journey: the Odditorium can not only fly but also swim, allowing the crew to voyage underwater to Avalon, the mythical realm where Excalibur resides. During their quest, they face a banshee assassin, sea monsters, and a witch seeking revenge on Alistair Grim for taking her magical objects. Unknown to Grubb and the others, an ancient Avalonian prophecy has already determined their fate—one that may reveal a destiny beyond even Alistair Grim's comprehension.