Follows a fourteen-year-old American girl whose life unexpectedly transforms when she moves to London in 1952 and gets swept up in a race to save the world from nuclear war.

Sixteen-year-old Gwyneth discovers that she, rather than her well-prepared cousin, carries a time-travel gene, and soon she is journeying with Gideon, who shares the gift, through historical London trying to discover whom they can trust.

Showing no interest in the sumptuous balls, lavish dinner parties, and country weekends enjoyed by the rest of early nineteenth-century London society, seventeen-year-old Lady Alexandra Stafford seeks adventure as she investigates the puzzling murder of the Earl of Blackmoor, father of devilishly handsome Gavin.

In 1794 England, the rich and beautiful Sovay, disguised as a highwayman, acquires papers that could lead to her father's arrest for treason, and soon her newly-awakened political consciousness leads her and a compatriot to France during the Revolution.

Rescued from the gallows in 1850s London, young orphan (and thief) Mary Quinn is surprised to be offered a singular education, instruction in fine manners - and an unusual vocation. Miss Scrimshaw's Academy for Girls is a cover for an all-female investigative unit called The Agency, and at seventeen, Mary is about to put her training to the test. Assuming the guise of a lady's companion, she must infiltrate a rich merchant's home in hopes of tracing...

A young centurion ventures among the hostile tribes beyond the Roman Wall to recover the eagle standard of the Ninth, a legion which mysteriously disappeared under his father's command.

In 1868, teen aged Sherlock Holmes discovers that his American tutor is hunting a notorious killer who was supposedly killed by the United States government, but who is apparently alive and well in Surrey, England.

In 1352 England, seventeen-year-old Annabel, granddaughter of a knight and a would-be nun, eludes a lecherous bailiff but falls in love with Lord Le Wyse, the ferocious and disfigured man to whom her family owes three years of indentured servitude, in this tale loosely based on Beauty and the Beast.

In 1852, when seventeen-year-old Katharine is sent to her family's estate to prove that her uncle is insane, she finds he is an inventor whose work creating ingenious clockwork figures supports hundreds of families. But strange occurences soon have her doubting her own sanity.

Seventeen-year-old Agnes Wilkins is about to make her debut into 1815 London society at a lavish party, where she meets Lord Showalter, a wealthy and eligible man who collects Egyptian antiquities and who is hiding a dangerous secret.