Books like The haunted lagoon by Mildred Augustine Wirt Benson

Ricky and his friends uncover a buried treasure, learning how greed can distort and endanger.

Nancy Drew and friends head to a picturesque lakeside cottage for a quiet vacation, but eerie rumors, hostile neighbors, and a hidden burial ground turn the stay into a thrilling hunt for a buried treasure and a family secret.

In this children’s detective mystery, the Alden siblings join their grandfather at Goldwin University’s class reunion and unravel clues to a buried Civil War treasure while confronting a spectral presence in the campus bell tower.

Joe and his dog Wishbone restore the Skeleton Reef Lighthouse, uncovering a mysterious treasure and dangerous secrets that turn a community project into a thrilling adventure.

Nancy Drew investigates whether an ivory elephant charm truly shields its wearer, unraveling a conspiracy involving the Bengleton Wild-Animal Show.

Meg Mackintosh tries to solve a mystery while on a whale watch with her friends.

Nancy, George and Bess set out on a bike tour around Mystic Lake for a birthday celebration, but when their tour guide disappears and supplies are stolen, Nancy races to untangle the mystery.

Nancy Drew and her friends unravel a murder mystery tied to a university basketball team.

Alexandra Clifford, a career‑focused woman in Vancouver, refuses to settle into romance—until Laurier Tait, a visitor who values commitment, challenges her beliefs. Their clash of ideals sparks a passionate love story.

Nancy Drew, now eighteen, embarks on a thrilling treasure hunt, tracking a long‑missing man to uncover the second half of a buried treasure map.

In Roman mysteries, Flavia Gemina and friends investigate a seaside villa where danger, a fragile heirloom and buried treasure intertwine.

A determined pathologist follows the trail of her sister’s unsolved murder while navigating new love and Irish folklore, only to find the case may be tied to a century‑old disappearance that threatens her family’s future.

While constructing a clubhouse, a group of boys discovers a buried treasure that vanishes mysteriously the following night, sparking a detective quest amid trees and baseball lore.

When Beacon College prepares for its centennial, the Dana girls investigate a hidden treasure and missing codicil supposedly left by founder John Beacon, confronting extortionists, Viking lore, and dangerous obstacles on campus.

When Prince Rudolph Krisler seeks help locating long‑lost heirlooms, guardians of the Dana Girls are drawn into a mystery that takes them from Germany to the Swiss Alps, where adventure, danger, and intrigue await.

Louise and Jean Dana return to the rebuilt Starhurst School, where they unravel a mystery involving a prized fountain, warring riddles, and a bizarre gorilla‑man to protect the campus.

Three young detectives—Louise, Jean, and Malee—track a stolen gilded bamboo Garuda bird to Thailand’s bustling canals, where their sleuthing leads to a daring boat chase and a reveal of an international jewel thief.

When the Dana girls accompany their friend to Lisbon, they must crack two mysteries—a serial cork theft and a stolen guitar on an ocean liner—while evading a cunning gypsy troupe.

When two sisters receive the same invitation to a teenage pageant, they become teenage detectives racing to recover a stolen jeweled crown and rescue a kidnapped contestant.

Three teen sleuths, Louise and Jean Dana with friend Judy Platt, hunt a mysterious silver dolphin—an object or a creature—after a radio reward announcement, uncovering a conspiracy that leads them from Miami to a deserted Caribbean island.

Teen sleuths Louise and Jean Dana investigate a haunted museum, a roaming tiger, and eerie curses in the town of Oak Falls, uncovering a mysterious conspiracy involving a priceless marble tiger.

A hidden note in an old violin sparks the McGurk Detective Organization into a hunt for a buried cache of uncut diamonds.

As school closes for the summer, Betty Gordon and her friends prepare to depart for Ocean Park. Shortly before they leave, they meet a strange girl named Sally Cutler, who is riding on a wagon that is pulled by a zebra. Betty and her friends learn that Sally is chasing after two men who stole her father's car. After asking about the zebra, Betty and her friends learn that Sally's father has taken in several members of a failed circus, including the fat lady, bearded lady, skeleton man, and tattooed boy. Betty helps Sally search for the men who stole her father's car, but the men get away. Soon after Betty and her friends arrive at Ocean Park, they once again encounter Sally. Sally's father has opened a carnival, and the young people promise to attend. Betty is shocked to see an airman who looks just like one of the car thieves, but since she has no proof, nothing can be done. Betty and Bob keep an eye on the airman and his companion, convinced that they are the car thieves. In time, Betty and Bob get the proof they need, and the men are brought to justice.