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Nora investigates a family mystery while trying to work out whether she can rely on Patch.

Claire’s arrival in Paris brings new sights, people and language, alongside the pleasure of exploring with Camille. Her curiosity about why she was sent there drives the mystery.

A hands-on science project collection, spanning topics from plants and heat to cells and DNA. Its examples include constructing a solar oven and investigating how eggshells respond to stacked phone books.

The mystery turns on whether Walter is a threat to his family, with the Hardy brothers investigating alongside Greg and Mike. A diary, a kidnapping and a scheme against Walter drive the action.

Expect a hands-on introduction: projects invite readers to try archaeological methods and interpret objects, while examples connect those techniques with discoveries and human history.

Haroun’s investigation brings him into a world of espionage and alleged nuclear-material trafficking. The premise pairs a young protagonist’s dangerous new role with a threat described as urgent.

This is a clue-led adventure: the brothers investigate obstruction around freighter bookings, encountering coded messages and a smuggling ring.

This is a tense missing-person mystery: Gabie worries she was the intended target and works with Drew to find Kayla before she is found dead.

A comic premise pairs cheerleading with covert sleuthing: Tessa and the SOS investigate suspected cheating, then Tessa must consider her own relationship.

A speculative thriller built around stolen, downloadable memories, a hidden past and a government experiment. Seven and Alba’s uneasy bargain draws them into a chase involving the London Guard and Alba’s prosecutor father.

The mystery pairs a stolen literary artefact with a frame-up: the brothers must work out who is placing pages among their things and why.

Follow Sadie, an arson dog whose scent helps investigators find the causes of fires. She also visits schools to share fire-safety teaching. The book centres on her working role and the people who regard her as a hero.

This Tudor court mystery follows Lady Grace as she investigates a death after a ball, with help from Ellie and Masou.

Alongside dinosaur facts, the book looks at prehistoric habitats, climate, plants and other animals, and explains how fossils are found and studied.

A large New Year’s Eve party takes place at the Peterson family home, near an abandoned house associated with strange happenings. The story centres on what emerges when old mysteries demand attention.

A classic detective adventure with a peculiar mystery at its centre: missing dogs, a reported dragon and a cave to investigate. Suspense and strangeness sit alongside the puzzle-solving.

A friendship-led supernatural mystery turns into horror as Laine investigates Debbie’s death through the board. Expect a focus on eerie events and a threatening presence rather than a light account of friendship.

The mystery pairs seasonal spookiness with a more personal puzzle: how to judge coincidences when you are worried. Mary Anne’s friends are part of the investigation, not just bystanders.

A supernatural romance-and-peril finale, with two intertwined strands: Sydney’s pursuit of a former enemy and Adrian’s investigation of spirit magic. It is the sixth Bloodlines book.

This is a neighbour-focused mystery in which Lydia and her sister pursue answers together. The plot’s appeal centres on puzzling discoveries and growing suspicion rather than an informational topic.

This blends a supernatural undercover mystery with school identity, family changes and relationship concerns. Its appeal may lie in watching a goth protagonist navigate cheerleading as well as vampire-slayer duties.

A mystery built around a missing prize ring, with Nancy trying to make sense of a tangle of clues. The carousel ceremony and contest give the investigation a lively, public setting.

This is a mystery built around an investigation by two friends. Suspicion falls broadly across the town, while the pollution and the poisoning provide a grim backdrop to their search.

This is a linked-mystery adventure: Nancy follows a coded pigeon message while investigating a strange nighttime signal. The appeal centres on clues, danger and solving how the cases fit together.

This is a child-led detective mystery with an environmental question at its centre. Hannah’s investigation unfolds alongside her and her mother’s unsettled living arrangements.

A holiday mystery centres on a stolen camera and the friends’ efforts to work out who took it. The setting and holiday activities sit alongside the investigation.

This is a clue-led detective adventure, with the Hardy brothers investigating the vanishing water while also helping their father with his case.

A clue-gathering mystery set around a buffalo ranch, with Nancy and her friends trying to discover who took a young buffalo.

A club-saving mystery driven by four friends’ attempt to secure money intended for their Boys Club.

A school investigation drives this story, with Laurel pursuing a cheating scam despite resistance from classmates and her brother.

Expect a character-led fantasy mystery with two narrators, a homecoming and an investigation. Friendship and banter sit alongside questions of blackmail, suspicious fires and Michael’s unease about being useful.

The mystery centres on the callers’ silence and Claudia’s suspicion. The group’s investigation has “mixed results”, though what those involve is not specified.

A brisk mystery built around a lodge, a reported ghost, a hidden-money hunt and a cast of possible suspects. Frank and Joe face several threats as they investigate.

A fast-moving Hardy Boys mystery pits an environmental campaign against deliberate sabotage. Frank and Joe pursue a case involving a workplace death and evidence of serious crimes, with their investigation placing them at risk.

A prehistoric predator provides the entry point to a nonfiction account of fossils and how scientists investigate the ancient past. The subject combines dinosaur-era animal life with the discovery of a fossil in modern times.

A child detective mystery built around missing dogs, neighbourhood concern and Hannah’s effort to investigate after suspicion falls on her.

A fantasy adventure links unusual forms of magic with a mystery: Sandry must teach a young dancer while helping confront a killer threatening local merchants.

This is a mystery driven by an investigation, uncertain trust and danger to Connie. Its premise also brings workplace upheaval and Maria’s precarious position into the story.

This is a murder mystery centred on Pip’s effort to reassess a closed case. The investigation brings buried secrets and suspicion into a town still affected by the deaths.

A chilly carnival mystery turns into a rescue-and-detective adventure, with the gang trying to stop a giant and find out what is really happening.

Expect a school-set murder mystery in which a photograph draws suspicion towards Nicole and complicates her friendship with the victim’s girlfriend.

This is a suspense-led story of discoveries and escalating danger, centred on Lin’s search for the truth and her difficulty deciding whom to trust.

This is a crime mystery built around a team investigation, an unusual pattern of killings and a code to decipher. The stakes rise as the investigators get closer to an answer.

A fantastical mystery-adventure pairs two young recruits on a mission involving disappearing school oddbods, with a hidden museum ministry as their unusual base.

A summer job turns into a mystery involving a frightening costume, stolen money and suspicion falling on Clay’s friends. Clay decides the incidents are connected and sets out to investigate.