Duncan Culpepper Books in Order

A coded message in a library book leads Dunc and Amos to a burglary ring targeting Melissa's home. Amos wants to impress her by stopping the thieves, but his eagerness brings a succession of comic obstacles.

Researching a Civil War cannon leads Dunc and Amos into a time portal. They arrive in Culpepper in March 1862, just before the Monitor and Merrimac clash, turning a historical investigation into an unexpected encounter with the past.

Amos believes an old house is haunted by Blackbeard's ghost, while Dunc remains skeptical. A quiet resident claims he invented the haunting to keep visitors away, but flames from his mouth make that explanation difficult to accept.

Dunc and Amos crash in the wilderness while trying hang gliding. Amos hopes a survival book can guide them, but their predicament worsens when a wild man holds them captive and they must find a way to escape.

Dunc and Amos enter the world of competitive skateboarding and befriend Lash, who plans to attempt a world record. When someone steals his prototype board, the boys set out to retrieve it before his chance disappears.

When a valuable doll once owned by Charles Dickens's daughter is stolen from a mall exhibition, Dunc and Amos investigate. Tracking the thieves brings them face to face with a vicious watchdog guarding what they hope to recover.

Dunc and Amos plan a Halloween route that will maximize their candy haul. Their evening takes an unexpected turn when a werewolf bite leaves Amos behaving like a puppy, complicating the friends' carefully arranged trick-or-treating plans.

Dunc and Amos encounter an elderly parrot in a pet store and discover that it speaks four languages. Learning that it has outlived ten owners draws the curious friends into an adventure centered on its unusual history.

Dunc and Amos visit Uncle Woody's cattle ranch near Santa Fe, expecting a week of fun. Overhearing a plot against their host draws them into an investigation of cattle theft that threatens the ranch and its owner.

Dunc and Amos expect two weeks of rules and bad food at camp, but a threat against the director changes their plans. Missing funds and matching red-flower tattoos lead the boys to investigate suspicious members of staff.

Amos wants to impress Melissa by performing on the trapeze at a visiting circus. Before Dunc can stop him, the friends uncover a backstage mystery, giving them another problem to solve amid the risks of Amos's ambitious plan.

A visit to Scotland brings Dunc and Amos to an ancient castle where groans emerge from walls and painted eyes seem to follow them. Stories about its headless former lord encourage the boys to investigate the apparent haunting.

Dunc and Amos investigate con artists who have cheated elderly townspeople. Meeting Betsy Dell and her unpleasant nephew raises their suspicions, while disturbed soil and a shovel in her shed suggest that something more dangerous may be happening.

When toxic waste appears in the school dumpster, Dunc and Amos try to identify the polluters. Their investigation becomes more alarming when Amos begins glowing in the dark, adding a strange complication to their search for the culprits.

Dunc, Amos, and cousin T.J. visit the mall for Christmas shopping, only to discover disappearing presents and suspicions surrounding Santa. The boys adopt seasonal disguises to catch an impostor before more gifts and Santa's reputation are lost.

Amos wins a Caribbean cruise in a contest about his dog and takes Dunc along. Something suspicious about his suitcase draws the friends into unexpected danger, forcing them to investigate who is threatening their long-awaited vacation.

Dunc and Amos meet an extraterrestrial named Girrk, whom Amos hides beneath his bed and promises to help home. When Amos develops strange new abilities, Dunc wonders what their unusual guest really wants from the boys.

Amos hopes tickets to a Road Kill concert will impress Melissa, so he asks Dunc for help. Their plans take them backstage, where a threat against the band turns an anticipated romantic outing into a dangerous investigation.

Dunc and Amos are asked to coach a T-ball team whose players barely understand the game. With the opener approaching, a threatening man in a limousine adds another problem to managing confused children and anxious parents.

Amos adopts leather clothes, slicked hair, and a false name after a threatening new student arrives. While the friends investigate a stolen-stereo racket, Dunc worries that Amos's attempts to act tough or undercover have gone too far.

A ski vacation puts Dunc and Amos near an Olympic champion attempting a slalom speed record. When Dunc suspects someone plans to sabotage the run, he races to intervene while Amos struggles with the slopes.

During a class visit to the state capital, Dunc and Amos meet a crown prince who looks exactly like Amos. The prince proposes switching places to expose a traitor, putting Amos's ability to impersonate royalty to the test.

Amos Binder has long adored Melissa Hansen without any sign that she notices him. When she suddenly begins flirting and using affectionate nicknames, Amos is delighted, but Dunc wants to understand what lies behind her surprising change.

Dunc and Amos investigate the Chameleon, a criminal wanted in five states who can disguise herself as different people. Sneaking into her apartment seems the next step, but her shifting identities make their investigation uncertain and dangerous.

Amos suspects his sister Amy's new boyfriend is a vampire, given his pale appearance, strange disappearances and plans for a late-night Halloween gathering. He and Dunc investigate before Amy's romance can become something far more alarming.

Amos is mistaken for a government double agent and receives a secret assignment. His trench coat and dark glasses may suit the role, but handling actual espionage requires help from Dunc as the friends confront the consequences of mistaken identity.

A gorilla named Louise develops an attachment to Amos, making his life unexpectedly difficult. Dunc believes she is connected to a case involving assassins and a senator, drawing the friends into a mystery with an unusually powerful complication.

Amos and his dog Scruff have never liked each other much. When Scruff becomes caught up in a dognapping operation, Amos and Dunc go undercover at the city pound to investigate and try to bring him home.

At winter sports events, Dunc and Amos agree to help a North Korean skater defect. When she suddenly denies asking for help and treats them with hostility, the boys must investigate a puzzling change that threatens their plans.

Amos believes a junkyard owner is a retired superhero, while Dunc remains doubtful. When a sinister professor appears to control the city council and threatens the town's money, the friends need to investigate whether their unlikely neighbor can help.