"The prisoner Morro; or, To the enemy on the loose" - an exciting adventure romantic book by the famous writer Upton Sinclair. The main character finds himself in danger and faces incredible trials in the captivity of the enemy in Cuba. The book offers readers an exciting plot, which is full of unexpected turns of events and tense situations. Full of everyday life, drama and inner struggle of the hero, the book "The Prisoner of Morro; or, To the enemy on the loose" will remain in the hearts of readers long after reading it.