Regan Fitz and Elliot Mason have been enemies since they started training to become Glitchers--people who travel through time to preserve important historical events. But everything changes when they find a letter from Regan's future self, warning them about an impending disaster that threatens them and everyone they know. Will they be able to set aside their past in order to save the future?--Amazon.com

When Claudia's twin Reese runs for president of the Culvert Prep sixth-grade class, he threatens to upset her bid for re-election. Claudia documents the chaotic race for president through interviews with classmates, text messages, photos, and other highly important evidence.

An oral history that reports, through transcribed recordings, text messages, photographs, illustrations, screenshots, and more, on the First (and last) Annual Culvert Prep Middle School Scavenger Hunt For Charity, and the adventures of twelve-year-old twins Reese and Claudia Tapper as their highly competitive teams scour New York for treasure.

Livvy and Gates intend to beat the competition at the Springdale Robots Meet this year, but their entry seems to have a mind of its own --

Meg goes to Maker School to hone her talent for building with boxes -- but when Simone, another boxitect, arrives -- they become so competitive they nearly fail in the annual Maker Match.

A shark and a train compete in a series of contests on a seesaw, in hot air balloons, bowling, shooting baskets, playing hide-and-seek, and more.

Patryk and Jurek are as much friends as rivals in the small Russian-occupied Polish village where they live. When, in August 1914, Patryk finds an old button on the forest floor, Jurek becomes wildly jealous. Not long after, World War I comes to Poland, bringing one invading army after another to the village. Jurek devises an exciting dare among the seven boys in their pack: whoever steals the best military button will be Button King. The boys agree....

A twist on the classic game of Rock Paper Scissors, this story celebrates the differences that make three friends unique. The ninja, the cowboy and the bear do everything together. But when a contest among themselves leads to resentment, they soon learn that the only way to stop disagreeing is to be considerate of their differences and appreciate one another.

"Best friends and ninjas-in-training Joey and Johnny are sent on a special mission to investigate their rival ninja school's use of advanced technological weapons"--

Angelina goes to the most famous city in Mouseland to perform at the Big Cheese Dance Show with her cousin Jeanie, but the two clash over whether tap or ballet is better.