
Based on your book
by White, Jamie
Martha is the kind of protagonist who finds the mundane details of a small town far more suspicious than most adults care to admit. She operates with a sharp, observational eye, turning everyday life into a series of puzzles waiting to be cracked. The reading experience is breezy and grounded, trading high-octane action for the quiet satisfaction of a girl who knows how to connect the dots while everyone else is distracted. It feels like a well-kept neighborhood secret; the stakes are personal and immediate, anchored by Martha’s dry wit and her refusal to be underestimated. If you enjoy mysteries that prioritize character over grit, and you like spending time with a lead who is as clever as she is quirky, this is the perfect afternoon read.
Since you enjoyed Martha’s knack for turning small-town observations into full-blown investigations, you will likely appreciate these other stories featuring young, sharp-witted sleuths. We picked books that balance that same investigative spirit with a strong sense of independence and personality. Whether it is the science-minded approach of Flavia de Luce or the classic, puzzle-heavy tension found in The Westing Game, these selections highlight the joy of the kid detective archetype. Each of these picks captures that specific, delightful tension of a protagonist who sees exactly what the adults are missing.
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Like Martha, Enola is a sharp-witted young girl navigating a mystery while defying the societal expectations of her time. Both books feature a clever, independent protagonist who relies on her own ingenuity to solve puzzles and outsmart adults.
This classic shares the observational, inquisitive spirit found in Martha's investigations. Both stories center on a young girl who is determined to uncover the truth, often leading to personal lessons about human nature and friendship.
by Alan Bradley
Flavia de Luce is a brilliant, science-obsessed young detective who, much like Martha, approaches mysteries with a unique and analytical perspective. Readers who enjoy the blend of youthful curiosity and genuine danger in Martha's world will find Flavia's adventures equally engaging.
by Siobhan Dowd
This book captures the same 'kid detective' energy, focusing on a young protagonist who uses his unique way of thinking to solve a high-stakes disappearance. It mirrors the pacing and investigative structure that fans of Martha on the Case enjoy.

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For readers who enjoy the puzzle-solving and 'on the case' aspects of Martha's adventures, this book offers a high-energy, game-filled mystery. It features a clever ensemble cast working together to solve riddles, maintaining a lighthearted and fun tone.
by Kate Milford
This story offers a slightly more atmospheric and cozy mystery, perfect for readers who like the investigative element of Martha's stories but want a touch of the unknown. It features a young protagonist uncovering secrets within his own home, echoing the 'small-scale' but important mysteries Martha solves.
This timeless classic features children taking charge of their own investigations and adventures, much like Martha. It captures the independence and resourcefulness that young readers love to see in their favorite sleuths.
While slightly more mature, this book is perfect for fans of Martha who are ready for a more complex, multi-layered mystery. It features a dedicated teen detective obsessed with solving cold cases, blending modern investigation with historical secrets.
by Ellen Raskin
This is the gold standard for puzzle-based mysteries that young readers adore. Like Martha on the Case, it relies on sharp observation, a cast of eccentric characters, and a race against time to solve the central riddle.
Sammy Keyes is a quintessential spunky girl detective who constantly finds herself in the middle of trouble. Readers who love Martha's voice and her knack for getting involved in local mysteries will find a kindred spirit in Sammy.

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As an Amazon Associate, we earn from qualifying purchases.
As an Amazon Associate, we earn from qualifying purchases.