Don and Jim Mercer were prepared to spend a dull vacation at home when
Professor Scott invited them to Lower California and a search for Spanish treasure. But their adventure was not all fun, for Don, Jim,
and their friend Terry Mackson soon found themselves involved with a band of ruthless men determined to salvage the treasure for
themselves and to stop at nothing to do it. Don and Jim fought for their lives in a series of startling adventures which make this story
of buried treasure an absorbing and exciting tale.
