Boa Constructor: A Branches Book (the Binder of Doom #2)

In a small town, machine parts are mysteriously disappearing, leading Alexander and his friends, Rip and Nikki, to suspect a monster is constructing a devastating machine. To thwart this threat, they leverage the summer maker program at the library, combining creativity and ingenuity. Alongside their mission, they also aim to uncover the identity of the person leaving monster trading cards for the Super Secret Monster Patrol. Adventure and mystery intertwine as they navigate this unusual summer challenge.