In 22nd-century Great Britain, where climate change has caused vast flooding, piratical raiders kidnap the Prime Minister's daughter and thirteen-year-old Lilly Melkun, an English fisher-girl, takes her seacat on a daring rescue attempt, with a mysterious talking jewel from a past computer age tucked in her belt as ransom.

After returning the missing children from history to their original time periods, thirteen-year-old Jonah must save time itself when aviator Charles Lindbergh mysteriously appears and kidnaps Jonah's sister.

"When their parents are kidnapped by the Empire, Milo and Lina Graf set of to rescue them. After narrowly escaping Captain Korda's evil clutches on Thune, Milo and Lina track the source of a rebel transmission to a remote jungle planet. But they are unaware of the dangers lying in wait."--

"When scientists discover a rare and mysterious mineral buried in the Earth's crust, they have no idea that it just happens to be the most valuable substance in the entire universe. It's not long before aliens show up . . . offering a promise of protection, some fabulous new technology, and entry into their intergalactic coalition--all in exchange for this precious resource. A material so precious that other alien forces are willing to start a war...