Not only because the number grows every year, but also because there are different types of books to be considered, and this is, of course, just with the official releases by Wizards of the Coast in mind. Even something as simple as answering the question “ how many Dungeons & Dragons Fifth Edition books are there?” is complicated. It’s not easy to come up with that answer, though.
How many books were there? Following you have the most up to date and exhaustive answer I can come up with. I wanted all the Dungeons and Dragons books. Which books did I need to read to get ready? As someone who loves to digest stupid amounts of information, even more so when they give me an advantage, I was ready to read everything. In fact, that was what scared me the most once I decided to join my first Dungeons and Dragons Fifth Edition game.