In a dark future, when North America has split into two warring nations, fifteen-year-old Day--a famous criminal, and prodigy June--the brilliant soldier hired to capture him, discover that they have a common enemy.

"The planet Kerenza is attacked, and Kady and Ezra find themselves on a space fleet fleeing the enemy, while their ship's artificial intelligence system and a deadly plague may be the end of them all"--

"Thomas Fawkes is turning to stone, and the only cure to the Stone Plague is to join his father's plot to assassinate the king of England."-- Keepers think the Igniters caused the Stone Plague; Igniters think the Keepers did it. But all Thomas knows is that it's spreading, and if he doesn't do something soon, he'll be a lifeless statue. So when his Keeper father, Guy Fawkes, invites him to join the Gunpowder Plot and blow up the Igniter King-- claiming...

As the plague decimates London in 1665 and an assassin threatens the apothecary's life, apprentice Christopher Rowe and his faithful friend Tom, following a trail of puzzles, riddles, and secrets, risk their lives to untangle the heart of a dark conspiracy.

When a bizarre disease that attacks only physicians and their patients sweeps the country, Dr. Melissa Blumenthal discovers that sinister forces are behind the threat and finds her life in danger.

"A deadly plague has struck Olympus and is slowly aging and killing the Olympians. Emily can only stand by and watch as those she loves fade and die. But in one last desperate attempt to save those she loves, she journeys back to Earth to face the CRU, then back in time to confront Cronus, leader of the Titans and father of the gods"--

Bryn, Ari, and their dragon Lilja discover a sick baby gyrpuff and join the rest of the Seekers in trying to determine if a dreadful plague has returned--and if human forces brought it back.

"Sophisticated robot Abel must save teenaged soldier Noemi from capture on a hidden planet, while outwitting armies of deranged service robots and securing medical aid for a plague on Noemi's home world"-- Shunned after a trip through the galaxy with Abel, the most advanced cybernetic man ever created, Noemi Vidal dreams of traveling through the stars one more time. When a deadly plague arrives on Genesis, Noemi is the only soldier to have ever left...

In gloriously gross detail, you'll meet dangerous microscopic invaders like protozoa, fungi, viruses, and foreign bacteria - then see how our bodies work to fight back and defend us against future infections. We get to know the critters behind history's worst diseases. We delve into the biology and mechanisms of infections, diseases, and immunity, and also the incredible effect that technology and medical science have had on humanity's ability to...

The people of fourteenth-century Florence, Italy, starving after years of bad weather and natural disasters, now face the Black Plague but twelve-year-old Maria is determined to survive. Includes historical note, glossary, and discussion questions.