Where has Felix gone? He's has traveled back in time. Soon letters start to arrive for Sophie from the world of the Ancient Greeks, from a Viking town, and from America before the Europeans arrived. Kids will love traveling back in time with Felix and seeing the past come alive. Illustrations.Langen, Annette is the author of 'Felix Travels Back In Time', published 2004 under ISBN 9781593840327 and ISBN 1593840322.