When Lord Garmadon uses his mega weapon to turn back the clock and bring an ancient monster back to life, the Ninjago try to stop him, but end up being turned into children instead.

A Cahill family member from the past is out for revenge in this thrilling conclusion to the Doublecross series.

In the future, when the Earth is no longer easily habitable, seventeen-year-old Tora Reynolds, a girl in hiding, struggles to protect weapons developed by her father that could lead to disaster should they fall into the wrong hands.

"Jack, June, Quint, and Dirk have battled the worst kind of monsters, zombies, and cosmic servants, but an endless horde of animated skeletons is next-level. While the kids plan their next move, an unexpected threat emerges and June gets separated from her friends, dragged miles away from Wakefield to a town overgrown with monstrous vines and never-before-seen creatures. Drawing on her post-apocalyptic survival and action skills--and with the help...

After three years in exile Kestra Dallisor has been summoned back to Antora by her father, right-hand man of the seemingly immortal king, Lord Endrick, but she is intercepted and kidnapped by the Coracks who want to use her to get the Olden Blade, which they believe can be used to kill the despot--Simon, one of the rebels with his own grudge against the Dallisors, is assigned to accompany her, but Kestra has her own plans and she does not intend to...

"Surviving their first winter after the Monster Apocalypse was no easy feat, yet Jack and his buddies waste no time springing to action against some of the nastiest, most evil monsters around. When Jack discovers his Louisville Slicer has new, otherworldly powers, he's thrown into epic training to find out what kind of destruction the blade can wield. But between fighting off zombies, fleeing from strange, glowy Vine-Thingies erupting from the ground,...

Now firmly on the side of the Coracks, sixteen-year-old Kestra Dallisor plans to use the magic Olden Blade to kill the evil Lord Endrick, but when she fails, Endrick turns her into one of his Ironheart soldiers, without any memory of her rebellion, and bound to obey him, his spy within the Coracks; the rebel Simon is desperate to return her to the Kestra he loves, but he is reluctant to use the magic that might heal (or destroy) her--and neither Simon...

Nikki Tesla is a genius, so mostly she finds school boring, and amuses herself by inventing things, like her mysterious missing father; trouble is most of her inventions have serious, lethal potential (like the death ray, which just blew a hole in her floor); so she and her ferret are hustled off to the special Genius Academy with classmates who are equally exceptional, although she still worries about fitting in--but when her death ray disappears...

Eighteen-year-old Ziva, a magically gifted blacksmith with social anxiety, must race against the clock to save her beloved sister and stop a devastating war.

It's the first winter after the Monster Apocalypse. For Jack and his buddies, that means sled catapults, epic snowball battles, and one monstrous Christmas celebration. But their winter wonderland turns dark when a villainess begins hunting them. And this villianess is different--she's a human. When the villainess steals Jack's prized monster-slaying tool, the Louisville Slicer, he vows to get it back. But it won't be easy. Jack and his friends soon...