In the fourth tale in this beloved series, villainous Sebastian Eels returns to Eerie-on-Sea, thrusting Herbie and Violet into a new adventure involving a missing girl, a spooky wax museum, and a dangerous clockwork robot. Herbie Lemon, Lost-and-Founder at the Grand Nautilus Hotel, and his fearless friend Violet Parma have unearthed many secrets in their village of Eerie-on- Sea: secrets lurking beneath the waves, lapping onto the beaches, and lying behind locked doors. When their brilliant and ruthless nemesis, Sebastian Eels, returns with a plan to open the long-shuttered waxworks museum, Herbie and Violet suspect nefarious motives. Their investigation leads them into the dark Netherways below