If the Arthurian hints behind the Drews’ search—the attic map in the Grey House, the chase to hidden caves, and Merriman’s quiet guidance toward an old Grail—hooked you, you’ll love how Colin and Susan stumble into ancient forces under Alderley Edge. The Weirdstone of Brisingamen pits them against the Morrigan and her goblin-like svarts in moonlit chases through mines, with the wizard Cadellin playing a Merriman-like guardian. It’s the same mythic chill, just deeper into British folklore.

If you loved following the Drews from a dusty attic discovery to decoding clues and prying into secret compartments—never sure which adult to trust—you’ll click with Lewis and his warlock uncle’s mansion. In The House with a Clock in Its Walls, Lewis and Mrs. Zimmerman hunt for a doomsday clock Isaac and Selenna Izard hid in the walls, sifting clues through hallways that creak with menace. It’s that same puzzle-box thrill, with occult stakes ticking louder by the page.

If Cornwall’s cliffs, tidal caves, and the Drews’ seaside sleuthing gave you shivers, The Whitby Witches delivers that same coastal dread and wonder. Siblings Jennet and Ben arrive in Whitby and uncover eerie old rites, watchful elders, and inhuman folk haunting the harbor. Like your time with Merriman and the children, modern streets brush against something older and darker—until the past comes crashing in with teeth.

If Merriman’s steady, half-revealed guidance of the Drews was your favorite thread, you’ll be drawn to Tom Ward’s apprenticeship to the Spook. In The Spook’s Apprentice, Tom learns the craft of binding boggarts and facing witches like Mother Malkin, with a mentor who—like Merriman—keeps perilous truths close until the moment you need them. It’s that mentoring bond tested by real, creeping darkness.

If the Drews’ leap from holiday normalcy into a secret struggle—guided by Merriman and racing to keep a relic from the Dark—made your heart pound, A Wrinkle in Time hits the same nerve. Meg, Charles Wallace, and Calvin are whisked off by Mrs. Whatsit, Mrs. Who, and Mrs. Which to confront a shadow that swallows worlds. It’s the same surge of discovery and courage, with cosmic vistas to match the sea-cave climax you loved.