Before we go further, let's address the elephant in the room. Searching for a of a copyrighted book like Dentogist almost always leads to pirated copies.
The first result was a site that looked like it hadn't been updated since the dial-up era. A giant "DOWNLOAD NOW" button blinked with the predatory energy of a deep-sea anglerfish. Leo clicked. A pop-up informed him he was the millionth visitor and had won a vacuum cleaner.