Tintin in the land of the Incas

The Seven Crystal Balls and The Prisoners of the Sun by Herge!

One of the best selling adventures of Tintin revolves around the investigations into the abduction of their friend Professor Calculus and its connection to a mysterious illness which has afflicted the members of an archaeological expedition to Peru. The disappearance of an Inca mummy and Professor Calculus takes Tintin to the Temple of the Sun where all the answers lie.

P.S. Beware of pirated copies of important books (with missing sections) circulating online.