Haunted castle on Hallows Eve —Osborne, Mary Pope, author.

Moonlight on the magic flute —Osborne, Mary Pope, author.

Jack and Annie travel to Vienna, Austria, in 1762 where they meet the young Wolfgang Amadeus Mozart and his sister and help save the budding genius' life.

Dark day in the deep sea —Osborne, Mary Pope, author.

When eight-year-old Jack and his seven-year-old sister, Annie, join a group of nineteenth-century explorers aboard the H.M.S. Challenger, they learn about the ocean, solve the mystery of its fabled sea monster, and gain ...

Night of the ninth dragon —Osborne, Mary Pope, author.

Introduces readers to classic Welsh legends as Jack and Annie return to Camelot to assist King Arthur, Merlin, and the Knights of the Round Table.

Carnival at candlelight —Osborne, Mary Pope, author.

While on a mission to prove to Merlin that they can use magic wisely, Jack and Annie travel to seventeenth-century Venice, Italy, to save the city from disaster.

Night of the new magicians —Osborne, Mary Pope, author.

Jack and Annie visit the Paris World's Fair of 1889 in an effort to protect four scientific pioneers from an evil sorcerer.

Dragon of the red dawn —Osborne, Mary Pope, author.

When Merlin is weighed down by sorrows, Jack and Annie travel back to feudal Japan to learn one of the four secrets of happiness.