Nobody visits Eerie-on-Sea in the winter. Especially not when darkness falls and the wind howls around Maw Rocks and the wreck of the battleship Leviathan, where even now some swear they have seen the unctuous malamander creep… Herbert Lemon, Lost-and-Founder at the Grand Nautilus Hotel, knows that returning lost things to their rightful owners is not easy – especially when the lost thing is not a thing at all, but a girl. No one knows what happened to Violet Parma’s parents twelve years ago, and when she engages Herbie to help her find them, the pair discover that their disappearance might have something to do with the legendary sea-monster, the Malamander. Eerie-on-Sea has always been a mysteriously chilling place, where strange stories seem to wash up. And it just got stranger...

There's a storm raging in Eerie-on-Sea. Has the mighty Gargantis come back from the deep...? When an ancient bottle is found washed up on the beach after a ferocious electrical storm, all the residents of Eerie-on-Sea seem to want it ... but should they in fact fear it? Legend has it that the bottle contains an extraordinary secret that spells doom for the whole of Eerie-on-Sea. Could it be true that the vast sea creature Gargantis has awoken from her slumbers, and is causing the large cracks that are appearing all across the town? Finding themselves entrusted with the bottle, Herbie and Violet discover they will need to ride the terrible storm and pacify the creature if they want to save Eerie-on-Sea from sliding into the ocean and being lost for ever.

In the third mysterious tale of Eerie-on-Sea, it's almost Ghastly Night, and the Shadowghast—an ancient spirit in a lantern—lurks in wait for the power to enslave the town. In this third adventure, shipwrecked orphan Herbert Lemon, Lost-and-Founder at the Grand Nautilus Hotel, must square off with a creature of town lore as he confronts a shadow from his past. While other towns celebrate Halloween, in Eerie-on-Sea it's Ghastly Night, and a grim spirit in a lantern awaits its moment. Legend has it that if people fail to light manglewick candles on Ghastly Night, and if no showman conjures shadow puppets on the pier as an offering, the insulted Shadowghast will seize and devour the shadows of the living. This year, a professional theater troupe has been summoned, including a raven-haired magician named Caliastra with startling news of Herbie's origins. No sooner have the players checked into the hotel than townspeople start vanishing into thin air, including the guardian of Herbie's best friend, Violet Parma. It's up to Herbie and Violet to separate truth from sleight of hand and solve the mystery of the Shadowghast lantern before darkness swallows them all.

When Herbie and Violet's arch-enemy Sebastian Eels turns up in Eerie-on-Sea, seemingly back from the dead, it can only spell bad news. The town may welcome his entrepreneurial scheme to resurrect Festergrimm's Waxworks, a dusty and defunct old gallery of spooky characters from Eerie legend, but Herbie and Violet are suspicious of his motives. And when they learn the legend of Ludo Festergrimm the clockmaker, creator of a vast mechanical robot that wrought havoc in the wrong hands, they KNOW they're on the right track. But how can they get the residents of Eerie-on-Sea to believe them?

Herbie and Violet's fifth gripping adventure brings the internationally bestselling Eerie-on-Sea series to a heart-stopping climax. It is midwinter once again, and the hosts of a paranormal podcast have descended on Eerie-on-Sea eager for a sighting of the legendary malamander. Herbert Lemon, Lost-and-Founder at the Grand Nautilus Hotel, is feeling uneasy – and not just because of the visitors. He’s being plagued by unsettling dreams, and the head-splitting “Eerie Hum” that is reverberating through the town. Something is dreadfully wrong, and it seems to be coming from Eerie's very core. Herbie and his friend Violet Parma will need all their courage as they head deep below the town to seek answers. Perhaps here, finally, they – and the malamander too – will discover the Deepest Secret of Eerie-on-Sea.