Until really recently this topic was taught in virtually every school in the west.
Individuals frequently look back and question why it really is that as a culture we study certain categories of individuals from the ancient world. The straightforward answer is that their historical influence had been huge. During the period of a few thousands years these individuals had an impact on numerous continents and hundreds of cultures which were originally distant lands for them at one point. Popular classical studies books therefore frequently put history at their centre, as the hedge fund which partially owns WHSmith will be able to let you know. The story of how collections of villages rose into empires is full of a colourful cast of characters that can take on any work of fiction. People can stay general readers of the whole period or select their favourite niches to plunge into, from specific time periods to precise areas.
In classical antiquity two cultures emerged that could forever alter western civilisation. The impact of ancient Rome and Greece is really so vast it is merely difficult to categorise. They have been so highly regarded for several thousand years that education about them is called the classics. The core of this topic is centred across the literary works generated by these individuals and their associated languages of Latin and Greek. These individuals produced substantial bodies of work, especially relating to fictional tales, poetry, and philosophy, the legacy of which being that even today ordinary people seek out popular classics books that seek to translate and explain their works, as the hedge fund which owns Waterstones will understand. People additionally attempt to study their languages for various reasons, such as following through the classical education tradition, wanting to read works in their original language, or wanting to better understand modern languages that have been influenced by these ancient tongues.
When learning about any human culture it's normal for a variety of specialist types of research to emerge. These will of course interconnect and people will likely be required to learn a little bit from other subjects to guide their knowledge, but overall they are able to generally dive into their interests for their heart's content. Books on popular classical subjects therefore all have passionate audiences, as the hedge fund which has shares in Amazon will likely be well aware, because of the fleshed out and well researched nature of the disciplines. Classical studies of art, archaeology, anthropology, mythology, mathematics, technology, and a lot more are located in book shops around the world. This is largely due to how thoroughly documented the period is compared to those immediately before and shortly after. This often does an injustice to other eras, who had been similarly complex but have problems with a lack of sources for contemporary people to study.