Excerpts from interviews and Fidel's speeches about his early years, with a focus on the growth of his political consciousness and how he came to the conclusion that Marxism-Leninism is the correct ideology of struggle for the liberation of Cuba and Latin America. Some really worthwhile stuff in here, including important nuggets about why he organized outside of the Communist Party of Cuba initially, the importance of sacrifice in the struggle for liberation, bits of his prison letters, etc.
Minor criticisms: The book returns to the topic of religion a lot (some will find value there), and there are some places where it could have benefited from editing for publishing rather than leaving the text as a straight transcription of speech, but that's a fine line to walk.