Informative but I find it lacking as an academic read (not fair, I know. As a casual read it is fine.) The writer's interpretations and speculations, given the evidence presented in the book, are somewhat subjective. At least, as a Chinese reader, some of the phenomena described in the book could be understood with a more culturally informed perspective. Some events or pieces of information, eluded to in the book but not elaborated, would be very meaningful to someone familiar with that part of the Chinese history. With the omissions (understandable given the scope of the topic), the readers are left with a very general idea of what happened, but for someone who hope for a more indepth account of Zhou Elai's life it is introductory.
If i may make a recommendation, readers who are looking for a well-sourced, well-researched account on Zhou Enlai's early life could try Zhou Enlai: The Early Years (1994) by Chae-jin Lee.
If anyone has other readings on Zhou to suggest, I'd appreciate it very much.