Usborne Children’s Books

Search Usborne



Jack stepped through the crack into the night. Outside the yard was quiet and thick, dark clouds hid the moon from view.

Squatting beside the door, he scooped handfuls of muck from a puddle and plastered it through his white hair. Muddy lumps dripped down his scarred face, oozing odorously into his eyes and nose, making him want to retch.

A spotlight swept past, outlining the barred windows. Jack crouched low to the ground and scanned his surroundings. The prison yard, the cells, the watchtower, the tall perimeter fence, the iron gates, the high stone wall tipped with iron spikes – all unbreachable. In its long illustrious history, no prisoner had ever escaped the ’Ville…

But he’d conquered worse. After fifteen years in maximum security, under constant surveillance, it was a mistake for them to transfer him here to Pentonville and a regular cell. This past week the screws had barely looked in on him, they'd even let him out to exercise. They should’ve known better. Now, because of their stupidity, he’d be the World’s Most Infamous Jailbreaker as well as its Greatest Escapologist!

Jack crawled towards the fence and pulled himself on to its wirey surface, scrambled upwards, vaulted nimbly over the top, and dropped down the far side. Landing with a squelching thump, he raced towards the main gate and exterior walls.

A drainpipe snaked up the side of the gatehouse. Jack brushed his muddy palms against his chest, took a deep breath, and began to climb.

Reaching the top, he hauled himself over the gutter onto the slippery roof and across a patchwork of tar and tiles. The exterior wall loomed above him in the dark. Mounds of leaves and globules of green moss gathered in the crevices up here, creating perfect hiding places for small items someone might wish to stash.

Jack rummaged in one such crevice and pulled out a tarry tangle of ropes. They’d been bartered and bargained for outside the oakum shed over the past seven days, and were the makings of a secret escape kit. He began fastening them together, checking each knot carefully and pulling them tight.

Long ago he’d taught Fin to do this. A good knot can be the difference between life and death, he'd told the boy. Especially for an escapologist, or a hanged man. Luckily he’d never yet been threatened with that final rope.

Thoughts of the old times led Jack to remember his wife and the plan they’d made long ago to hide his greatest treasure – the Blood Moon Diamond. Artemisia might be gone, but soon, very soon, that big beautiful stone would be his once more. And, oh, what a diamond day that would be!

Jack checked the last knot and fastened a heavy stone to the rope’s end. Then he stood and began whirling it around his head like a lasso, feeding out lengths of line until the stone picked up speed. When it was finally making a wide circle about his head, Jack released his grip.

The stone flew through the air, arcing over the exterior wall. For a second the rope wriggled, trying to snake free, but Jack kept a tight grip on its end, and the stone hit the ground on the wall’s far side with a clunk.

He waited a moment, listening…

Awhoo! Awhoo!

An owl hoot – the signal that the line was secure.

The searchlight was fast approaching once more.

Jack dropped flat against the tiled roof and, when it had passed, he jumped up and pulled the rope taut, testing his weight against it.

His knots held – as he knew they would.

He scraped the soles of his boots in the roof tar to make them sticky.

Then he began to climb.

The cracks between each stone made strong footholds. The top of the wall was fifteen feet above, but he took mere minutes to reach it and hop nimbly over a row of spikes that guarded the parapet, before lowering himself down the far side into the street.

Finlo stood beneath him wearing a battered bowler hat. He was a little taller than his father, though that wasn’t saying much – all the Doors were short. As a teenager, fifteen years ago, he’d been a skinny disappointing runt, but since then he’d added a few inches, filled out into a man. Perhaps, Jack thought, he might be useful on this mission after all.

Jack dropped to the pavement beside his son and embraced him, sniffing the air. Get a whiff of that peppery smell, Fin. I haven’t smelled that in fifteen years!”

Finlo took a deep breath. What is it?”


Jack flashed him a scarred smile. As he strode towards the prison entrance, a few feet away along the wall, a loud alarm bell began to wail.

Da, please,” Finlo called softly. We have to go.”

Quiet! I’ve one more trick up my sleeve…” Jack pulled a playing card from thin air and pinned it to the jail door.

When he lowered his arm, Finlo saw what it was: the Jack of Diamonds.

And now,” said Jack, slipping into the shadows, we disappear.”

Write a review


You have 0 of these in your Basket.


Amazon KindleApple iBooksGoogle Play


AudibleApple Audiobook

Storm clouds gather over Lily and Robert’s summer when criminal mastermind the Jack of Diamonds appears. For Jack is searching for the mysterious Moonlocket – but that’s not the only thing he wants.

Soon, dark secrets from Robert’s past plunge him into danger, because Jack is playing a cruel game. Lily and Malkin, the mechanical fox, must stay one step ahead before Jack plays his final, deadly, card...

  • Listen to Peter talk about the world and characters of Moonlocket on Fun Kids Radio:

Read free chapter

Book information

Key Stage
Lexile Measure
Accelerated Reader level
12 MY
ISBN: 9781474915014
Dimensions: 198 x 130mm

Author information

Peter Bunzl

Peter Bunzl grew up in London and lives there with his partner Michael. He is a BAFTA-award-winning animator, as well as a writer and filmmaker. Cogheart is Peter’s debut novel.

Read more about Peter Bunzl

Visit to find out more.

Peter Bunzl on Twitter


Shortlisted - Islington Schools Book Award

Reader reviews

Read the following reviews or write one of your own.

“Moonlocket review”
This book is surely going to entertain anyone in this books claws, it is filled with suspense and excitement, also with some sad parts.I loved the part where Lily and Robert were trapped in the Fleet River. Amazing and spectacular!
I think it is very good because it has exciting moments and good characters-Much better than Cogheart!
This book is great and I am reading the whole series and so far it has been my favorite book.

Press reviews

“Me and my older son really enjoy reading it. It is great reading, full of mysterious adventures and it took 3 evenings for my 9 years old child to finish! I have to admit that is even better than Cogheart. We are looking forward for the third one...”
“Normally, the sequel to a great book is generally never quite as good. But Moonlocket was as good, maybe even better! I loved the adventure, the thrill and at times the terror. You never knew what was going to happen next. It was full of surprises.”
“Deliciously dark and irresistibly gripping, Moonlocket proves to be another extraordinary story that you won't want to forget.”
“Moonlocket is a spellbinding sequel, a roller coaster journey full of catastrophe, buried secrets, breathtaking courage and intrigue.”
“The fabulous follow-up to Cogheart - adventure by the spadeful!”
“This brilliant sequel to Cogheart is full of daring, danger and family secrets in a richly imagined world that will sweep you away. A fantasy series that is magical, mysterious and mesmerising”
“This is a beautiful story with a great mystery running through it. My daughter loved Lily and her mechanical fox Malkin. It is a brilliant story set in a slightly different reality and it felt like reading Harry Potter in that it transported you to another world.”