In 1961, thirteen-year-old Sabine, an adventurer despite being crippled by polio, finds a forgotten bunker which might allow her, her family, and friends to reach freedom by tunneling under the Berlin Wall, or might lead to far greater danger.

When Ellie Baum accidentally time-travels via red balloon to 1988 East Berlin, she's caught up in a conspiracy of history and magic. She meets members of an underground guild in East Berlin who use balloons and magic to help people escape over the Wall. But even to the balloon makers Ellie's time travel is a mystery. When it becomes clear that someone is using dark magic to change history, Ellie must risk everything--including her only way home--to...

With the rise of the Berlin Wall, twelve-year-old Gerta finds her family suddenly divided. She, her mother, and her brother Fritz live on the eastern side, controlled by the Soviets. Her father and middle brother, who had gone west in search of work, cannot return home. Gerta knows it is dangerous to watch the wall, to think forbidden thoughts of freedom, yet she can't help herself. She sees the East German soldiers with their guns trained on their...

To find his way back home to his family in Germany during WWII, Max Bretzfeld, with a kobold named Berg on one shoulder and a dybbuk named Stein on the other, sets out to do the impossible--become a British spy--