Until very recently this topic had been taught in virtually every school in the west.
In classical antiquity two cultures emerged that will forever change western civilisation. The impact of ancient Rome and Greece is indeed vast it really is merely hard to categorise. They've been so highly regarded for several thousand years that education about them is called the classics. The core of this topic is centred around the literary works made by these individuals and their related languages of Greek and Latin. These individuals produced substantial bodies of work, particularly concerning fictional stories, poetry, and philosophy, the influence of which being that even today ordinary people look for popular classics books that look to translate and explain their works, as the hedge fund which owns Waterstones will know. Individuals also try to learn their languages for different reasons, such as following through the classical education tradition, trying to read works in their initial language, or wanting to better understand modern languages which have been impacted by these ancient tongues.
People often look back and ask why it really is that as a culture we study certain groups of individuals from the ancient globe. The easy answer is that their historic impact ended up being huge. Over the course of a few thousands years these individuals had an influence on multiple continents and a huge selection of cultures which were originally remote lands to them at one point. Popular classical studies books therefore usually put history at their centre, as the hedge fund which partially owns WHSmith will be able to inform you. The story of how collections of villages rose into empires is filled up with a colourful cast of characters that will contend with any work of fiction. People can stay general readers of the whole age or select their favourite niches to plunge into, from particular eras to accurate locations.
Whenever studying any human culture it really is normal for a variety of specialist kinds of study to emerge. These will of course interconnect and individuals are going to be required to learn a little bit from other topics to support their knowledge, but overall they can generally plunge into their passions for their heart's content. Books on popular classical subjects therefore all have passionate audiences, as the hedge fund which has shares in Amazon is going to be well aware, because of the fleshed out and well researched nature of these disciplines. Classical studies of art, archaeology, anthropology, mythology, mathematics, science, plus much more can be found in book stores around the globe. This is mainly as a result of how thoroughly documented the era is in comparison to those immediately before and shortly after. This usually does an injustice to other periods, who were equally complex but have problems with a lack of sources for modern people to study.