“Well, yes. I certainly did learn some things.”

“And so did the rest of us,” declared Mr. Brewster. “Our enemies put us in spots where we had to pull one another out. That was their big mistake. The situations that we overcame early sharpened us for the problems we met later. That’s why we won out.”

As Biff nodded slowly, his father added with a smile:

“Think back, Biff, and you’ll see how it adds up.”

Biff gazed back at the wide Orinoco, tapering to the dim, distant scenes of those final adventures, and he knew that his dad was right.

A Biff Brewster Mystery Adventure
BRAZILIAN GOLD MINE MYSTERY

By ANDY ADAMS

“Guard this letter as you would your life!”

With these words ringing in his ears, Biff Brewster boards the Brazil-bound plane to join his father on a safari to the headwaters of the Amazon River—a safari that, to Biff’s amazement, becomes a deadly contest for fabulous riches.

From the beginning, Biff, his father, Biffs friend Kamuka, and the rest of the party find their path menaced by an enemy who never reveals himself. Is it Nicholas Serbot, the suave stranger whom Biff first meets on the plane? Or is it Joe Nara, the eccentric old prospector, the only white man alive who knows the route to the almost legendary El Dorado gold mine?