Ren Jidian went to examine the books being sold in the Spartan agora, which wasn't much but does have quite a few interesting collections once in a while.
Unlike Athens, Spartans focus more on what they consider as 'necessities' rather than luxuries, and they consider books, stone slabs of text, and even art as 'luxuries'.
Which was true, he agrees. Back when he was in his original world, he only read books in libraries but couldn't afford to buy one. And regrettably had to pirate online copies when he was really desperate to read them.
Ren Jidian's love of books started way past his puberty. He was more interested in skateboarding and nature photography, and saw them as something boring because he wasn't keen on reading textbooks.
He preferred looking at pictures and seeing something visual, since as they say, a picture was worth a thousand words.