The Finniverse Series Series by Michael Buckley

Finn Foley has a lunchbox, and when he opens it, weird things come out . . . like a seven-foot-tall robot and a strange, blinking device that glues itself to his chest. The lunchbox also opens wormholes--shortcuts through space--that take Finn to the farthest corners of the galaxy.Sounds awesome, right?Not so much. Rocketing through the cosmos attracts the attention of the Plague, a race of gigantic bugs... moreFinn Foley has a lunchbox, and when he opens it, weird things come out . . . like a seven-foot-tall robot and a strange, blinking device that glues itself to his chest. The lunchbox also opens wormholes--shortcuts through space--that take Finn to the farthest corners of the galaxy.Sounds awesome, right?Not so much. Rocketing through the cosmos attracts the attention of the Plague, a race of gigantic bugs. The thing on Finn's chest belongs to them--it's the most dangerous weapon in the universe--and they want it back.To fight the Plague, Finn will need the lunchbox, as well as an unlikely squad of assistants: Lincoln, the bully; Julep, the coolest girl in school; Kate, Finn's unicorn-obsessed little sister; and Highbeam, a robot spy from another galaxy. If they can learn to work together, they just might have a chance, but the bugs are coming, and they'll stop at nothing to get their weapon--even if it means destroying the world. less

From the New York Times bestselling author of the Sisters Grimm and NERDS comes the second book in an action-packed middle grade series with equal parts humor and heart ! When Finn is saved from the Time Rangers by an older version of himself, it comes with a catch. Old Man Finn needs Finn and his friends, Lincoln and Julep, to help him win battles he lost years ago against the Paradox, a terrible creatures obsessed with revenge against Finn's father... moreFrom the New York Times bestselling author of the Sisters Grimm and NERDS comes the second book in an action-packed middle grade series with equal parts humor and heart ! When Finn is saved from the Time Rangers by an older version of himself, it comes with a catch. Old Man Finn needs Finn and his friends, Lincoln and Julep, to help him win battles he lost years ago against the Paradox, a terrible creatures obsessed with revenge against Finn's father. If they succeed, he promises to tell Finn where his father is. He even gives them a pair of time-traveling pajamas to help them with their quest.There's only one problem. The pajamas malfunction almost immediately. Along the way the kids avoid being eaten by sabretooths, shot by revolutionary war soldiers, and start a war with a town full of holograms, all in an effort to fix the jammies.Just when their goal is in sight, Julep gets sick. Only...it doesn't seem like she's sick. It seems like she's changing. The adventure may cost Finn more than an old pair of pajamas--it may cost him his friends! less