The epidemic strikes everyone who has passed through puberty. Abby Leigh is looking forward to watching the moon turn purple. For months, astronomers have been predicting that Earth will pass through the tail of a comet. They say that people will see colorful sunsets and, best of all, a purple moon. But nobody has predicted the lightning-fast epidemic that sweeps across the planet on the night of the purple moon. The comet brings space dust with it that contains germs that attack human hormones. Older teens and adults die within hours of exposure. On a small island off the coast of Maine,...

In a terrifying world where an epidemic has killed off most of the world's adults, fifteen-year-old Abby struggles to keep her brother and sister safe. When a new, deadly disease spreads among the survivors, Abby must make the dangerous journey to Colony East, an enclave of hidden scientists caring for a small group of children for reasons unknown. Abby fears that time is running short for the victims, but she's soon to learn that time is running out for everyone outside Colony East.

​​​​Recent evidence demonstrates that normal prostate tissue contains stem cells. There is also accumulating evidence that prostate cancer contains a population of cells with stem cell-like characteristics referred to as cancer stem cells, or tumor initiating cells. Both the normal prostate stem cell and cancer stem cell populations have important implications for the generation, therapeutic targeting, and prevention of prostate cancer. The purpose of this book is to explore the role of stem cells in prostate cancer, which is becoming an increasingly hot trend in...

The explosive conclusion to the Toucan Trilogy. Coldly implementing their vision of the future, CDC scientists allow a lethal infection to become an epidemic outside the colonies. Abby, her body wracked by the infection, begins a desperate journey to find her brother Jordan and her little sister Toucan, and save the lives of millions.

The explosive conclusion to the Toucan Trilogy. Coldly implementing their vision of the future, CDC scientists allow a lethal infection to become an epidemic outside the colonies. Abby, her body wracked by the infection, begins a desperate journey to find her brother Jordan and her little sister Toucan, and save the lives of millions.

When Abby's little sister, Toucan, contracts a new, deadly illness spreading among the survivors, they go on a dangerous journey to Colony East, an enclave of scientists caring for a small group of children. Abby fears that time is running short for Touk, but she soon learns that time is running out for everyone outside Colony East.

Abby is looking forward to watching the moon turn purple, unaware that bacteria from a passing comet will soon kill off older teens and adults. She must help her brother and baby sister survive in this new world, but all the while she has a ticking time bomb inside of her--adolescence.