Second-grade detectives Jigsaw, Mila, and their friends follow clues found in a Little Free Library suggesting that aliens are coming to Earth.

While living on a moon base with fellow lunarnauts, Dashiell Gibson investigates the murder of one of the moon's most prominent doctors.

For most of Tony Gilbert's life, he has thought of his uncle as "Weird Uncle Charlie." That is, until Uncle Charlie moves in with Tony and his family. Uncle Charlie is still odd, of course--talking about spirits and other supernatural stuff--but he and Tony become fast friends, and Tony ends up having a lot of fun with Uncle Charlie. When Uncle Charlie dies suddenly, Tony is devastated. Then he starts seeing Uncle Charlie everywhere! It doesn't help...

"A seventeen-year-old girl jumps between the lines of books and into the white space where realities are created and destroyed--but who may herself be nothing more than a character written into being from an alternative universe"--

The clones of Project Osiris are free-but they're being hunted. . . . After their narrow escape from their “perfect” hometown, Eli, Tori, Amber, and Malik are finally in the real world and determined to expose the leaders of Serenity. They decide to track down Tamara Dunleavy, the mysterious billionaire and founder of Project Osiris. Evading capture by breaking laws and sneaking into houses, hotels, buses, and cars-are they becoming the criminals...

Child prodigy Cadel Piggot, an antisocial computer hacker, discovers his true identity when he enrolls as a first-year student at an advanced crime academy.

"Six months ago, Mars Patel boarded a spaceship to travel to Oliver Pruitt's colony on the planet Mars, and now he's finally there. The journey gave Mars lots of time to bond with his copilots, but Mars and his new friends soon discover that Pruitt's colonists aren't the only people living on the inhospitable planet. A splinter group, led by the mysterious Fang, are desperate to go back to Earth--and they don't care who they hurt in the process. Amid...

Fourteen-year-old Bobby Pendragon and Spader from the planet Cloral journey back in time to 1937 New York City to uncover a plot by the evil Saint Dane.

"It was 1798 when the Morningstarr twins arrived in New York with a vision for a magnificent city: towering skyscrapers, dazzling machines, and winding train lines, all running on technology no one had ever seen before. Fifty-seven years later, the enigmatic architects disappeared, leaving behind for the people of New York the Old York Cipher -- a puzzle laid into the shining city they constructed, at the end of which was promised a treasure beyond...

"George is thrilled to score his dream internship at Tinker Tech. But he and his best pal, Jackbot, realize that something does not compute when a dangerous new invention threatens Terabyte Heights. As he and his friends search for answers, they uncover secrets about George's past that may change his life forever"--