"In a world where people are implanted with technology to recode their DNA, gene-hacking genius Cat must decrypt her late father's message concealing a vaccine to a horrifying plague"--

Mori and her friends live a normal life on Firefly Lane in Old Harmonie, a utopian community where every kid knows he or she is genetically engineered to be better and smarter, but when a strangely perfect new girl named Ilana moves in, the friends begin to question the only world they have ever known.

"On a very hot day, Min, a budding engineer, builds a machine that draws water from a well and into a swimming pool"--

When Ellie, who loves to invent and build things, decides to build a doghouse as a gift, she needs to get past the boys-against-the-girls neighborhood feud and ask for help.

The desert is no place for ocean-dwelling Kampii like Aluna and Hoku, especially now that Aluna has secretly started growing her tail.

Aluna and Hoku, Kampii from the City of Shifting Tides, and their friends, Equian Dash and winged Aviar Calli, are determined to stop a war. The maniacal ex-scientist Karl Strand is planning to conquer the world with his enormous army of tech-enhanced soldiers-- unless the four friends can get to Strand first. Aluna's plan is dangerous: pose as Upgraders and infiltrate the army. But the enemy isn't what they expected and the strategy begins to crumble....

"When there is a traffic jam on the Tinyville Town bridge, the residents decide to work together to build a new one"--

"When Castor the street dog is captured, he learns there is a nefarious underground fighting ring in Lion's Head where animals are injected with DNA-changing serums, transformed into dangerous hybrids, and forced to battle one another to survive"--

"Nere and her friends, all genetically engineered to survive in the ocean, go on a rescue mission."--

"A fox-bat named Kozmo joins the Unnaturals as they embark on a dangerous journey to the Greenplains while their human allies try to uncover the truth about why the mutant animals were created"--