After twelve-year-old Lark, determined to escape her squalid life, steals a magical sword from the Royal Museum, she reluctantly becomes the next Nightingale, destined to vanquish an ancient evil.

Secundo enjoys searching the beach below his home for treasure, but after becoming attached to a mysterious cutlass he meets its owner, who offers something greater for its return.

Much to their initial dismay, a twelve-year-old boy and girl discover they are destined to become knights of King Arthur's legendary Round Table, but first they must find and reforge Excalibur and break a curse that has weakened the magic of the Twenty-Five and a Half Realms.

At the flea market nine-and-a-half-year-old Chase and his younger sister Ava acquire an old suitcase filled with rows of carefully packed strange objects, and when they handle one of the objects (a dragon-headed doorknob) they find themselves in King Arthur's castle, on a mission to save the King--and pursued by a strange man whom they first saw at the flea market, who is after their suitcase.--

Odo and Eleanor are excited to be knights. Only, nobody's asking them to go on a quest. So they're stuck at home, using their trusty and talkative swords to defend their village when there's cause for defence. But mostly it's just waiting for something bigger to come along. That 'something bigger' comes to them in the form of an old man named Edga, a warrior named Hundred, and an ancient chant: Dragon, dragon, heed our call. Come to aid us, one and...