When twelve-year-old Leo Finch finds a mysterious letter hidden beneath his grandmother's floorboards, he's swept into an impossible adventure aboard the Starlight Express?a celestial train that rides the Skyway between worlds. With its wheels of shimmering auroras and carriages woven from moonlight, the train carries urgent messages across the stars. But the Skyway is crumbling. Orion's Belt has vanished, stolen by forces that seek to unravel reality itself.

Now, as the newest Moonlit Messenger, Leo must deliver a series of cosmic letters to restore balance. Joined by Noodle, a quick-witted ferret with a penchant for trouble, and guided by a conductor whose coat is stitched with moving constellations, Leo races against time. His journey takes him to the Library of Lost Constellations, where books anchor the fabric of existence; through the treacherous Gearworks District, where time itself is breaking down; and into the clutches of the Inkblood Pirates, who trade in stolen starlight.

Yet the greatest threat looms in the shadows?the Composer, a being of ink and erased words, determined to rewrite the universe into silence. To stop it, Leo must uncover the truth behind his grandmother's past, decipher a riddle hidden in his own childhood drawing, and make a choice that could change the fate of every world connected by the Skyway.

The Moonlit Messenger and the Starlight Express is a spellbinding tale of courage, legacy, and the enduring power of stories?perfect for fans of magical trains, cosmic mysteries, and unforgettable adventures.