The Time Trippers Go West

Two school friends, Matt Johnson and Linda Chapman, have an incredible secret. They can travel in time!
But Mr Wells, their history teacher and the inventor of the time machine, is mysteriously absent from school.
Nobody knows where he is, but when Linda and Matt receive an e-mail from America, 1864, it's the start of an extraordinary adventure, an adventure that catapults the two friends into the Civil War and the Wild West, where they will learn about the real life of the Indians.