Magic in the Mix (Miri and Molly) Unabridged edition

Molly and Miri Gill are twins. They look the same, act the same, sometimes even think the same. But they weren't always twins... Molly used to live in 1935, until Miri traveled back in time to save her from the clutches of Molly's evil adoptive family. Only they know about the magic, and its power to set things right. So when home repairs unleash more unexpected magic from their very special... very magical old house, the girls set off on another time-traveling adventure to the Civil War where they race against the clock to save two unusual soldiers and come to terms with the truth about Molly's real past.