Prisoners of the Sun

In this sequel to The Seven Crystal Balls, Tintin, Snowy and Captain Haddock must find Professor Calculus. The trail leads to Peru in one of Tintin's strangest and most exciting adventures.

  Prisoners of the Sun

Happy Homemaker of Oregon, 12/27/2011

This is the second in a two-part series, where Tintin started out searching for Pro. Calcus, and now is trying to discover the secret of the crystal balls. They end up barely escaping being sacrificed to the heathen gods,and seeing with their own eyes the treasure of the Aztecs!
I do, however, give one caution for this book. In it the Axtec priests practice voodooism. Not a reason to avoid the book, just something to be aware of.