The Vanguard is an exciting adventure novel from acclaimed author Sidney S. Grier. The book tells the story of a group of brave brave people who united in a dangerous mission deep in the jungle to rescue a missing archeological researcher. Trials, danger and secrets await them, but they are ready to go to the end in their search. Full of tension and adrenaline, the book "Front Squad" will grab you from the first pages and won't let you go until the last.