Based on its content, structure, and effectiveness, I would rate this book 4.5/5.
"Hacking the System Design Interview" by Stanley Chiang is an excellent resource for anyone preparing for system design interviews. The book provides a comprehensive, practical approach to system design, covering essential topics and best practices. With its structured approach and real-world examples, this book is an invaluable resource for both beginners and experienced engineers.
As for the availability of a free PDF version, I couldn't find any legitimate sources that offer the book for free. However, you can try searching for free preview or sample chapters on online platforms like Amazon, Google Books, or Academia.edu.
