An excellent primer on tech role. A great resource for preparing for both PM and data science interviews. Even if you're not interviewing but somewhat transitioning into the role, it will help you map out the requirements, expectations, skill set, etc.
The interview-specific sections are a boon for anyone on the job market, and most of the questions are just about the same regardless of the position. This should be one of the first books to grab for an introduction to tech industry roles.
It is highly recommended!