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Books seven and eight in Shannon Hale and Dean Hale's New York Times best-selling series take the Princess in Black on two of her biggest adventures yet!

In The Secret Explorers and the Comet Collision, space expert Roshni leads a mission that's out of this world - literally! With rainforest expert Ollie, she is set the task of fixing the space probe orbiting Jupiter before a comet hits the planet. With the clock ticking, it's a race against time for the Secret Explorers as they dodge asteroids, complete daring spacewalks, and use all their skills to complete their mission.

Liam O’Connor should have died at sea in 1912. Maddy Carter should have died on a plane in 2010. Sal Vikram should have died in a fire in 2026. But all three have been given a second chance - to work for an agency that no one knows exists. Its purpose: to prevent time travel destroying history.....

Regan Fitz and Elliot Mason have been enemies since they started training to become Glitchers - people who travel through time to preserve important historical events. But everything changes when they find a letter from Regan’s future self, warning them about an impending disaster that threatens them and everyone they know.

On Al Chaudhury’s 12th birthday his beloved Grandpa Byron gives him a letter from Al’s late father. In it Al receives a mission: travel back to 1984 in a secret time machine and save his father’s life.

Meet Resilience, a Mars rover determined to live up to his name. Res was built to explore Mars. He was not built to have human emotions. But as he learns new things from the NASA scientists who assemble him, he begins to develop humanlike feelings. Maybe there’s a problem with his programming…. Human emotions or not, launch day comes, and Res blasts off to Mars, accompanied by a friendly drone helicopter named Fly. But Res quickly discovers that Mars is a dangerous place filled with dust storms and giant cliffs.

The magic tree house has returned, and it's taking Jack and Annie back in time to Alaska, 1925. There they meet Balto, a jet-black Siberian husky destined to save victims of the diphtheria epidemic. But the trail isn't easy, and Balto is going to need Jack and Annie's help!

When Stink learns that Pluto has flunked the Planet Test for being too shrimpy, he has no choice but to take a stand for the sake of little planets (and little people) everywhere. Will our humble hero, Stink Moody, be smart enough to defeat a panel of big-shot scientists and class know-it-all Riley Rottenberger? For the answer to this burning question, tune in - and prepare to have your universe rocked!

Franky can't wait to move to his new town - although he wishes he didn't have to leave his best friend, Dani, behind. But everything changes after the storm, when strange green lightning and powerful thunder crash down on the town. From that night on, the kids who live on Franky's street start to change. One by one, they become a little odd. A little unusual. A little...magical. Franky's always wanted to be part of an amazing gang - just like his hero, super-spy Zack Danger! And soon, he realises that there's real danger in store for himself and his new friends.

An evil force has arrived on Planet Oceanella, and the seadons' wings are disappearing. When Space Agent Star Girl is sent to investigate with her two best buddies, they find that it's not only the seadons that must face this evil. Can the agents put a stop to the GDC mission and rescue the alien seadons before it's too late?

Join Rose and her friend Sarah on a thrilling journey through time, exploring pivotal moments in history from the past to the present. With the help of remarkable allies, including Tesla, Einstein, and Franklin, they must outwit the sinister Whiskerton, who threatens to erase the world's diverse heritage. Can they preserve the timeline?

Planet Polare's ice is melting, and now the alien life forms are in danger. When Star Girl is sent to investigate with her roommate, she discovers that not all dangers come from hairy aliens or strange planets. Can the two space cadets put aside their differences and work together to save the planet and its inhabitants?

When Space Captains Star Girl, Galactic 6 and Star Cluster are sent to investigate, they find there's more than just hot springs letting off steam. Planet Molteyser's springs are losing their minerals, and the brontoneysers are getting sick.

Ten-year-old Sam is a master of gadgets and gizmos, but his world is turned upside down when his homemade radio picks up a mysterious signal. It's a faint, lonely beep, a cry for help coming from millions of miles away... on Mars! A small, forgotten rover is stranded, and Sam knows he can't ignore its call. Teaming up with his brilliant best friend, Lily, and the ever-daring Finn, he hatches a plan that's out of this world. Using his great-grandpa's secret scrapbook and a pile of junkyard treasures, the three friends build the Stardust Scavenger—a real, working spaceship!

When Space Cadets Star Girl and Comet XS are sent to investigate, they get themselves into a tangle. Can they trust each other enough to save the planet and its vine aliens?

Planet Botanicus has been struck by a strange and sudden drought, and the purple-eyed trappers are drying up. When Space Cadets Star Girl, Star Cluster and White Dwarf are sent to find out why, things get a little too hot to handle. Can they shut down the heat on Botanicus in time to save the planet and its alien purple-eyed trappers?

Planet Chimparos is heading for a population crisis, and the chimpares are losing their homes. When Space Cadets Star Girl and Neuron Star are sent to investigate, they discover that there's no place like home. Can they find out what is causing the overcrowding problem and save the planet and its alien chimpares?

Planet Petalbeet is being attacked by pests, and the beetbugs are losing their food source. When Space Agent Star Girl is sent to investigate with two other agents, she discovers the beetbugs aren't the only ones with a pest problem. Can the agents work together to save the planet and its alien beetbugs?

Elio è un ragazzino di 11 anni con una fervida immaginazione e una passione per lo spazio. Un giorno viene accidentalmente teletrasportato nel Communiverso, un'organizzazione interplanetaria con rappresentanti di galassie lontane, dove viene erroneamente identificato come il leader della Terra. Ora Elio deve affrontare la sfida di costruire un rapporto con gli eccentrici alieni, attraversare una crisi intergalattica e scoprire chi è veramente e qual è il suo posto.

Join eight-year-old Captain Eva and her trusty robotic co-pilot, Bolt, on a thrilling adventure across the cosmos! When the fearsome Nebula Pirates steal her grandfather's precious Starlight Compass, Eva embarks on an epic chase through the galaxy to get it back. From navigating glittering asteroid fields and outsmarting traps in shimmering crystal caves to facing the cunning Captain Void himself, Eva must use all her wits to reclaim her treasure and prove that the biggest heroes can come in the smallest packages.