Carol Fisher Saller

Ozzie is the only cousin Ellie and Kat have ever known, and his guardian, a beloved magician, has literally disappeared. So what if Ozzie's from England in the year 1323? Not a problem when your mom has a time machine. The twins sneak off to medieval Ackenbury and join a band of musicians and performers to follow the clues. Juggling secrets, lies, a daring rescue, and some really horrible food, the twins learn that family isn't just something you inherit.
It's something you'd cross centuries for.