Everything But Espresso - Professional Coffee Brewing Techniques by Sc | Five Elephant.

How long the water interacts with the coffee grounds. In a pour-over, contact time is controlled by grind size and pour speed. In immersion brewing, it is controlled manually by when you press or plunge. Popular Non-Espresso Brewing Methods

Generally, no legal, free PDF is publicly available. Scott Rao’s books are copyrighted, highly respected in the coffee industry, and not released as free downloads by the publisher or author. Any PDFs found on file-sharing sites (like Reddit, random forums, or Google Drive links) are typically unauthorized pirated copies .