When a British computer hacker finds his name coded into a centuries-old manuscript, TimeRider Maddy recognizes it as the same message she had also been sent. Sure it must be communication from other TimeRiders agents, she sends Liam and the two support units back to Robin Hood's time to search for the fabled document-possibly the Holy Grail. But as a war begins to brew between King Richard and his brother John, Liam unwittingly takes on the role

...

They thought the plague was dead. They were wrong.

Two years ago, a virus hit London, killing thousands of people and driving the rest into hiding. But Leon has somehow survived, making it through two harsh winters. Now he's living on the fragile hope that the freezing snow and ice of the English climate wiped out the virus for good. Word even reaches Leon of a rescue boat on its way.

But all is not as safe as it seems.

...

An unidentified virus wipes out most of the Earth's population and Leon, his mother, and younger sister Grace, who just moved to London from New York, must run for their lives. An unidentified virus wipes out most of the Earth's population, liquefying their bodies. The virus moves as if it has an agenda-- it adapts as it moves quickly across the planet. Leon, his mother, and younger sister Grace, who just moved to London from New York, must run for...

Rescued from imminent death, teens Maddy, Liam, and Sal join forces in 2001 Manhattan to correct changes in history made by other time travelers, using a "time bubble" surrounding the attack on the Twin Towers to hide their journeys.

"A time wave has altered the entire history of the Civil War. Abraham Lincoln followed Liam into the present from 1831 and now the world is in a dangerous state of limbo. If the TimeRiders can't return Lincoln to the past, the Civil War will never end."--