Summary:

This is the 21st book in the Extraordinary Voyages Series. Joam Garral grants his daughter's wish to travel to Belém where she wants to marry Manuel Valdez. They travel down the Amazon River using a giant timber raft. At Belém, Joam plans to restore his good name, as he is still wanted in Brazil for a crime he did not perpetrate. A man named Torres, offers Joam absolute proof of Joam's innocence but the price that Torres wants for this information is to marry Joam's daughter. The proof lies in an encrypted letter. When Torres is killed, the Garral family must race to decode the letter before Joam is executed.