Paperback
(David M. Lopez Publishing, Feb. 15, 2004)
Maddy's blue "magic" marker takes her back in time to May 13, 1805, where she joins the Corps of Discovery, frequently accompanies Sacajawea, and faces the dangers of the American wilderness.
For her eleventh birthday, Maddie's father gives her a set of antique marking pens, and when she uses the red one she finds herself swimming with a crocodile in the Nile and traveling with the court of Queen Cleopatra.