Bad Machinery Books in Order

Two groups of school detectives pursue mysteries in Tackleford while competing for space at Griswalds Grammar. Gossip, homework, siblings and football distractions complicate the investigations of Shauna, Charlotte, Mildred, Jack, Linton and Sonny in this opening graphic novel.

Toddlers are disappearing around Tackleford, and rumors suggest a strange creature is roaming the woods. The young detectives investigate while Mildred's unusual new dog, Archibald, raises questions of his own before vanishing at a particularly inconvenient moment.

A series of fires in abandoned barns draws Linton and Sonny into an investigation with a new friend. Meanwhile, Lottie and Mildred encounter a misunderstood creature beneath a bridge, bringing their separate mysteries into unexpected contact.

New student Lem charms nearly everyone at Griswalds Grammar despite his odd habits and aloof manner. Shauna distrusts the sudden enthusiasm surrounding him, especially when her closest friends succumb, and teams up with outsiders to investigate.

Sonny becomes fascinated by a mysterious girl who seems to have emerged from the sea, while Mildred falls for a detention regular. Their romances encounter jealous former partners, protective parents and supernatural complications in the Tackleford detectives' latest case.

Summer splits the Tackleford detective team, leaving Linton, Jack and Lottie to confront a threat hanging over the city. Family romances, a troubling promotion and work at the local newspaper complicate their investigation into the unfamiliar and unknown.

A peculiar boy fascinated by mobile phones appears near a wormhole in the school's science cupboard. Lottie, Shauna and Mildred investigate his unusual behavior and their teacher's secrets, while the boys face mysteries of their own.

The Tackleford boys embrace mod fashion while Shauna explores heavy metal identity. A newly crowned King of the Mods inflames tensions between musical factions, leaving the mystery team caught in the conflict and questioning a possibly cursed scooter.

Shauna's carefully planned adolescence is disrupted when her older brother returns from prison. With grades, friendships and family becoming harder to control, she must work out how to protect the people she loves without sacrificing her own identity.

A fractured friendship, rising rents and development at a favorite swimming spot disrupt the Tackleford teens' summer. Charlotte pursues an internship at the local newspaper, where strange public art and suspicious civic activity offer fresh mysteries amid the changes.