Seven-year-olds Bradley, Brian, Nate, and Lucy make observations and gather clues that convince them that their older siblings, cousin, and animals have been captured by hungry space aliens.

"It all begins when Drew and Jonathan are doing what they do best--thinking up big plans for even bigger projects. Will they build a treehouse? A castle? A catapult? They have a whole lot of big ideas, but no one thinks they can do any of them! The twins brainstorm, scribble, and tinker until they have the perfect big plan. They'll save every last penny, sketch out some designs, and make a whole lot of noise--builders aren't known for being quiet--because...

"Clyde has a secret. Whenever he gets too excited, he changes into a monkey. His twin sister, Claudia, is worried that this isn't good for him. But when a ghost is seen in their school's hallway, Clyde will have to use his monkey powers to save they day. Will Clyde ever be a normal boy again?--Jacket.

Mayor Fitch has Tale Town on lockdown as he prepares for war with the trolls, for whose magic he will risk everything, but Red, Jack, and the other children are determined reveal the truth.

"Someone is secretly renovating the basketball court at the local park, and Zach and Zoe are determined to find out who"--

While competing in Spirit Week events at school, eight-year-old twins Zach and Zoe follow clues to find Zach's missing baseball, signed by his favorite major league player.

Ling and Ting are twins. They like to be silly and tell jokes. Most of all they like to laugh together. "Identical twins Ling and Ting like to be silly, tell jokes, and laugh together."--Publisher information.

"In this twist on the classic tale, Cinderella and her less-famous twin sister Tinderella leave splitting everything in half behind when each finds her own Prince Charming (with a little magical help from their fairy god-mother)"--

Ellie is looking forword to making new friends at Camp Hero, but her cabinmates, the Winter twins, whose power is to freeze things, do not seems to want to play with her, so Ellie uses her parents' latest invention to make them friendly--but it backfires when the twins start fighting each other over who Ellie likes best, and Ellie realizes that forcing someone to like you is not really cool.