Join Harley, her robot dog Sprocket and best friend Cosmo for problem-solving adventures and mysteries in Inventia, a world where science rules and technology grows in the forest; and where exploding science projects, giant slugs and runaway robots are all part of a normal school day.

The Iron Forest near Harley's home is unlike any other - plants and trees grow cogs and hinges and other mechanical parts - and all of Inventia depends on it. So when a strange fungus is discovered, there's a race to find a solution. Without essential parts for inventions, the town is quickly falling apart...

But just who or what is behind the mysterious infestation? Harley decides it's up to her to save the day - with chaotic results!

Harley Hitch is back with another inventive adventure! When the circus comes to town, Harley's curiosity get the better of her - and she accidentally breaks a cabinet that makes things magically disappear!

Soon after, everyone realizes that the Moon has gone missing. Time is speeding up, wildlife is getting disorientated by the darker nighttime, the wind is getting stronger, and there's no more tide. Is Harley to blame? Can she sort out the mess before it's too late?

An out-of-this-world follow-up to Harley Hitch and the Iron Forest. Author Vashti Hardy is the winner of the Blue Peter Book Award, known for her wildly imaginative stories that include important STEM lessons and themes. Fully illustrated throughout by illustrator George Ermos.

Harley is back with another inventive adventure! This term begins with a school trip to the coast, where Harley stumbles upon a mysterious fossil. Could it be that Harley has discovered an entirely new dinosaur species? Meanwhile, eager to best her class nemesis Fenelda in the contest for best invention, Harley dreams big with her attempt to invent a time travel machine. It doesn't seem to work, but soon strange happenings all over Inventia make her question whether the time travel machine might work after all! But what to do about the huge dinosaur that has been spotted in Forgetown?