Emanuel Ringleblum was a famous freedom fighter and historian during World War II and the Holocaust. He has hidden several incriminating documents about the Nazis, and it is your mission is to travel back to Warsaw, Poland, and retrieve these documents. There are informers and spies in every corner, so you have to be on your toes at all times! The Time Machine series challenges young readers to use their imagination and decision-making skills to write their own story. Options in the text allow readers to choose any path they like within the plot. Readers must draw on background information about the period to make the right choices. This makes the series a great educational device for youngsters to learn about history and all the different cultures, events, and periods that shaped it. Marc Kornblatt has written many plays, including Clifford's Voices, which has been produced in several theaters in New York. He has also written other books in the Time Machine series. Susan Nanus has written several plays, as well as the screenplay for the 1998 NBC miniseries A Will of Their Own.