Books like Der Zahlenteufel by Hans Magnus Enzensberger

xn + yn = zn, where n represents 3, 4, 5, ...no solution "I have discovered a truly marvelous demonstration of this proposition which this margin is too narrow to contain." With these words, the seventeenth-century French mathematician Pierre de Fermat threw down the gauntlet to future generations. What came to be known as Fermat's Last Theorem looked simple; proving it, however, became the Holy Grail of mathematics, baffling its finest minds for more than 350 years. In Fermat's Enigma--based on the author's award-winning documentary film, which aired on PBS's "Nova"--Simon Singh tells the astonishingly entertaining story of the pursuit of that grail, and the lives that were devoted to, sacrificed for, and saved by it. Here is a mesmerizing tale of heartbreak and mastery that will forever change your feelings about mathematics.

Jayfeather, Lionblaze, and Dovepaw wrestle with new clanking duties, training ambitions, and growing powers as the Third Clan saga unfolds.

An 11‑year‑old duo, Cass and Max‑Ernest, chase a vanished magician after discovering a mysterious box of scented vials, leading them into a maze of secrets, puzzles, and perilous adventures.

Cass and Max‑Ernest return for another secret‑laden adventure—this time confronting the sound‑shattering Sound Prism, the enigmatic Lord Pharaoh, and a mysterious bottled creature while navigating the Museum of Magic.

A whimsical adventure where a child’s mother is kidnapped by a sinister chocolatier, and the only hope lies in finding a legendary tuning fork that may reveal the secret behind the world’s best chocolate.

Peter Pan and the lost boys return to Neverland after a nightmare crisis.

David, a popular schoolboy, is cursed after helping an elderly woman be ridiculed, forcing him to confront his reliance on peer approval and find courage with new friends and a kind girl.

Cole Randolph returns to Arizona, but must journey to the floating kingdom of Creon where time can be warped. Facing a powerful villain, he and his friends race to protect the Five Kingdoms and secure their futures.

Three years after a cunning bargain, Rumpelstiltskin slices back into a royal court, using the power of multiplication to exact revenge—blended with clear math notes on whole‑number and fraction multiplication for young readers.

Tom and the Bone family navigate the darkening world, seeking the Spark that will restore peace and healing.

When a mysterious dream‑catcher threatens her fairy companion, twelve‑year‑old Philippa must untangle a magical mystery that could endanger her own life and comfort the grieving friend who lost her mother.