Books like Test of the Twins by Margaret Weis

At Hogwarts, a new school year is interrupted when the Knight Bus crashes and Sirius Black escapes Azkaban, bringing danger to Harry Potter. The school faces ominous divinations and the terrifying presence of Dementors that threaten every student.

Bilbo Baggins, a humble hobbit, embarks on an unexpected adventure with a dwarf company to recover dragon‑guarded treasure, facing trolls, goblins, elves, a giant spider, and the fearsome dragon Smaug.

An epic account of Middle‑earth’s ancient past, detailing its creation, the famed Silmarils, and the rise of Morgoth and Sauron.

In the triumphant finale of His Dark Materials, Lyra and Will confront perilous unknowns, aided by Iorek Byrnison and Gallivespian spies, while Dr. Mary Malone creates the legendary Amber Spyglass amid a climactic rebellion led by Lord Asriel.

A young prince and the powerful wizard Ged embark on a perilous quest across Earthsea to uncover the source of the fading magic that threatens their world.

In this final installment of the Earthsea Cycle, widowed Tenar encounters and tends to the aging magician Sparrowhawk, who has lost his powers.

In the epic Dragonlance world of Krynn, Raistlin, a powerful wizard, summons his twin brother Caramon and cleric Crysania to the Tower of High Sorcery, where timeless quests and ancient conflicts threaten their futures.

The children of heroes. A fabulous quest to retrieve the Graystone Gem. The legend of Raistlin’s daughter. Many years ago, Margaret Weis and Tracy Hickman told the story of how the Companions of the Lance fought to save the world from sliding into darkness, fought to restore the fragile balance of good and evil. The war was won. Peace came to Krynn. The Companions of the Lance became heroes. The river of time flowed on. The heroes dreamed of finding safe harbor on that swift-running river. But the balance of eternal power is ever shifting, ever changing. The Queen of Darkness was defeated, not destroyed. Her powers are strong; people are weak. They forget the lessons of the past or close their eyes to them. The river’s waters grow more turbulent, dangerous. It its not, however, the Heroes of the Lance who will be forced to plunge into the raging river of coming war. Their time is past. Their stories are told. It is for them now to hand the future to those younger, stronger. It is time to pass the sword—or the staff—to those who will become the Heroes of the Second Generation. Or to those who will bring about its doom.