When puzzle-loving Kip Bramley receives a cryptic invitation, delivered by a beetle-shaped drone that appears to be breathing, he has no idea that his world is about to change forever. Very soon he finds himself at Quicksmiths College of Strange Energy, hunting for riddles set 400 years earlier by a mysterious genius. But this isn't any ordinary treasure hunt: as the clock counts down, Kip will need all the help he can get from his loyal new friends and his faithful pet flying squirrel, Pinky. With danger mounting it seems much more is at stake for Kip and his family than he could ever have imagined.

The 2019 Green Earth Award-Winning trilogy opener is now available in trade paperback! Forty years after the earth was devastated by massive flooding, four children on one small sailboat must flee corrupt authorities and overcome the dangers of the sea that drowned their world. Twins Will and Annalie thought the hardest part about this year was going to be their separation when bookish Annalie began life at a prestigious Admiralty-run boarding school and avid sailor Will stayed behind in the flood-damaged slums. But that was before the Admiralty raided their father's engineering workshop. Before they sent a questioner to threaten Annalie at school. Before their father disappeared, leaving a single coded clue to his destination. Desperate to find their father, the twins set out in the family's small sailboat. But though they are both experienced sailors, they have no idea what dangers the sea has in store for them. With The Flooded Earth, Mardi McConnochie opens her middle-grade cli-fi saga at top speed, drawing readers into a race against pirates, authorities, and the sea itself in a not-so-distant future full of new technology and old human failings.

HarperCollins is proud to present its new range of best-loved, essential classics. 'The sea is everything. It covers seven tenths of the terrestrial globe. Its breath is pure and healthy. It is an immense desert, where man is never lonely, for he feels life stirring on all sides.' Scientist Pierre Aronnax and his colleagues set out on an expedition to find a strange sea monster and are captured by the infamous and charismatic Captain Nemo and taken abroad the Nautilus submarine as his prisoners. As they travel the world's oceans, they become embroiled in adventures and events beyond their wildest dreams. Visionary in its outlook, Vern's 20,000 Leagues Under the Sea is a legendary science fiction masterpiece.

The final book in the ground-breaking Hunger Games trilogy.

Against all odds, Katniss Everdeen has survived the Hunger Games twice. But now that she's made it out of the bloody arena alive, she's still not safe. The Capitol is angry. The Capitol wants revenge. Who do they think should pay for the unrest? Katniss. And what's worse, President Snow has made it clear that no one else is safe either.

Not Katniss's family, not her friends, not the people of District 12.

It's 2312 and Leo Fischer is a fifteen-year-old computer whizz on his first ever journey off Earth. He's heading to the moon colony to help his mother Lillian with her scientific work. But before he can reach her, she is kidnapped. Determined to find and rescue her, Leo has no choice but to accept the help of his newest friend, Skater Monroe, the daughter of a shuttle pilot and already an experienced space traveller. Their investigation leads them to an old freighter captain with a strange story about two spaceships: one a long-lost piece of junk called the Arcadian; the other, a sleek, ultra-modern ship of mysterious origin. Both craft are involved in some kind of cover-up, and Leo and Skater become convinced the conspirators are the same people who kidnapped Leo's mother. Dodging space pirates as well as a ruthless assassin in the pay of the soon-to-be president of Mars, they stumble upon a secret that could lead to all-out war in the solar system. The first instalment of Andrew Stickland's Mars Alone Trilogy is a gravity-defying thrill-ride into the human race's all-too-believable future in space.

The earth-shattering conclusion to Veronica Rossi's epic Under the Never Sky trilogy, and sequel to the New York Times and USA Today bestselling Through the Ever Night.

Their love and their leadership have been tested. Now it's time for Perry and Aria to unite the Dwellers and the Outsiders in one last desperate attempt to bring balance to their world.

Perfect for fans of the Hunger Games and Divergent series, Veronica Rossi's trilogy has been called "inspired, offbeat, and mesmerizing" (Kirkus Reviews, starred review) and "incredibly original" (Seventeen.com). Brimming with romance and danger and building to a climax that will leave you breathless, Into the Still Blue brings this "masterpiece" trilogy to an unforgettable close (Examiner.com).

The explosive final novel in the Endgame trilogy, by New York Times bestelling author, James Frey. Two keys have been found. The strongest Players are left. One final key remains to win Endgame and save the world. For Sarah, Jago, Aisling, Maccabee, Shari, An, and Hilal, Endgame has reached its final phase. The third key, Sun Key, is all that stands between one Player saving their line - or perishing along with the rest of the world. And only one can win. West Bengal, India: Maccabee is Playing to win. He has Earth Key and Sky Key and he is determined to find Sun Key. But in Endgame, fate can turn in the blink of an eye. He must Play carefully. He must watch his back. Kolkata, India: An Liu is Playing for death. His goal: stop Endgame, and take the world down with him. Sikkim, India: For Aisling, Sarah, Jago, Shari, and Hilal, their mission is to stop Endgame. Sun Key must not be found. No matter what they're Playing for, all of the remaining Players have one thing in common: they will end the game, but on their own terms.

A nine-year-old inventor is about to have her worst day ever in this laugh-a-minute mega-robot adventure! Molly should be doing her homework, but instead, she builds a robot to do it for her. The robot is pretty clever ... so clever that it decides to make another robot. Then that robot makes another one. Before long, an army of slightly-too-clever-for-their-own-good robots are running around town causing chaos. But when robot number one gets wind of Molly's plan to shut them down, the mechanical army set out to get rid of the humanoid once and for all. Now, Molly must race against time to stop the mega-robot invasion ... and hand in her homework!

Kaijin Sora behaved like any studious child his age who constantly indulged in reading books and thirsting for new knowledge. But there was one thing that distinguished him from other children -- his tenacious passion for fire. In hopes of curbing this strange and disturbing sickness, Kaijin's parents sent him off to study magic. Unbeknownst to Kaijin, the knowledge he would glean during his years of intense study would only further kindle his inner flames. What began as a simple childhood curiosity would ultimately transition into a blazing love so powerful, it kills.... "Firebrand" is an engrossing fantasy adventure filled with magic and mystery.

The thrilling sequel to the New York Times bestseller and international multimedia phenomenon, Endgame: The Calling. Endgame is here. Earth Key has been found. Two keys - and nine Players - remain. The keys must be found, and only one Player can win. Queens, New York. Aisling Kopp believes the unthinkable: that Endgame can be stopped. But before she can get home to regroup, she is approached by the CIA. They know about Endgame. And they have their own ideas about how it should be Played. Ideas that could change everything. Kingdom of Aksum, Ethiopia. Hilal ibn Isa al-Salt narrowly survived an attack that leaves him horribly disfigured. He now knows something the other Players do not. But the Aksumites have a secret that is unique to their line. A secret that can help redeem humanity - and maybe even be used to help defeat the beings behind Endgame. London, England. Sarah Alopay has found the first key. She is with Jago - and they are winning. But getting Earth Key has come at a great cost to Sarah. The only thing that keeps the demons at bay is Playing. Playing to win. Sky Key - wherever it is, whatever it is - is next. And the nine remaining Players will stop at nothing to get it...