If you are looking for a or a review to understand the plot before buying, many literary blogs provide deep dives into the character's psyche and how his POV changes the tone of the story.
Provides a summary and official links for the "Zimmerman" volumes. Yo Soy Eric Zimmerman Megan Maxwell pdf
You can find legitimate digital copies (e-books) or excerpts through major retailers and the author's official channels: If you are looking for a or a