While fourteen-year-old Enola Holmes endeavors to save her friend Lady Cecily Alistair from an unwelcome arranged marriage, she meets with some assistance from her older brother, Sherlock, and interference by the eldest, Mycroft.

Here was a man with an imagination so large that, just "by thinking on it," he invented a new branch of math, calculus, and figured out the scientific explanation of gravity. Yet Newton was so small-minded that he tried to destroy other scientists who dared question his findings. He spent much of his time trying to predict the future from passages in the Bible and to unlock the secret of turning base metals into gold in an alchemy lab, showing again...

Jonah, Katherine, Chip, and Alex suddenly find themselves in 1483 at the Tower of London, where they discover that Chip and Alex are Prince Edward V and Richard of Shrewsbury, imprisoned by their uncle, King Richard III, but trying to repair history without knowing what is supposed to happen proves challenging. Author's note includes historical facts about the princes and king.

When his father is arrested as a debtor in 1849 London, fourteen-year-old John Huffman must take on unexpected responsibilities, from asking a distant relative for help to determining why people are spying on him and his family.