Aiden and Maddy are starving to death on their Kansas farm when Jefferson J. Jackson finds them.  Jackson agrees to transport the siblings to Washington.  In return, Aiden will pay off the debt once they reach Washington, by working as a lumberjack.  In the middle of their trip, Aiden befriends some Nez Perce Indians who save his life.  When the Nez Perce find Aidan again in Washington, and ask for his help in obtaining the precious smallpox vaccine to bring back to their people, Aidan must decide if he will risk his life to help.

This was an excellent book and possibly one of my favorite pioneer books of all times.  From the opening pages, I was hooked on Aidan and Maddy’s story.  And although most Oregon Trail fiction ends with the first glimpses of the Williamette Valley, McKernan continues her story beyond the Oregon Trail.  The Devil’s Paintbox is rich with historical details, ranging from the Civil War, to drought in the midwest, the development of the smallpox vaccine, relations between the Native Americans and the pioneers, lumberjacking and much more.  I learned a lot while enjoying this incredible story.