If you want to get the full content of the book, I recommend purchasing a copy from a reputable online retailer or the author's website.
The PDF version of Cybersecurity for Beginners is not legally available for free from the author or publisher (Cyber Simplicity Ltd, published 2015/2017). Raef Meeuwisse is a working author, and distributing unauthorized copies violates copyright law. cybersecurity for beginners by raef meeuwisse pdf
Let's look at what actual readers say about the PDF version: If you want to get the full content