A brilliant but solitary teenager must unlock ciphers, unearth buried clues, and reckon with the outside world as she pursues an ancient secret in this brainteasing, puzzle-filled mystery.

“A must-read for fans of puzzle books and intelligent suspense.”—Meg Shaffer, bestselling author of The Wishing Game and The Lost Story

“A delight for readers who enjoy sifting through clues and poring over evidence alongside the hero, racing to see which of you can crack the mystery first.”—Ernest Cline, bestselling author of Ready Player One

Seventeen-year-old Arizona’s favorite things include cryptography, geocaching, the writings of Jules Verne—and exploring the Sierra Nevadas on her Russian Ural motorcycle, with her dog Mojo riding shotgun in his sidecar.

She’s not, in other words, your average teenager.

So when she learns her mother’s been kidnapped and finds a cryptic test accompanying the ransom note, she’s not just horrified—but electrified. Solving puzzles and cracking codes are what she does best, and she knows exactly how to tackle the challenge the kidnappers are dangling in front of her.

What she doesn’t yet realize is that she’s been enlisted in a treasure hunt, on the trail of an occult, centuries-old secret her father supposedly took to his grave. And if the prize at the end is real, it could shake the world.

As Arizona chases the truth through fiendish puzzles and ancient texts, unearthing clues both buried underground and hiding in plain sight in the Western landscape, she’s forced to navigate the outside world in ways she never has before―and begins to forge connections she never dreamed she could.

Featuring an indomitable young heroine and a plot that ingeniously weaves together real facts into a treasure hunt of epic proportions, The Language of the Birds is an irresistibly quirky, endlessly surprising adventure that will leave readers wondering where the truth ends and fiction begins.