Guest blog by Vanessa Tym

Mary Shelley didn’t intend to invent a new book genre when she wrote Frankenstein in 1822 but now, over 200 years later, every library and bookstore has a science fiction section.

Since the inception of categorizing literature, dating back to ancient Greece, we’ve been updating, expanding, and rethinking what genre means.

So, let’s take an in-depth look at the most popular book genres.

A genre is a category characterize...