What's the "relation between novels"

I have another question for you my smart friends if you please..

I read somewhere in this forum a member I think hush saying ( not by word..thiis is what I understood..)that it's better to read few novels and knew the "relation" between them better than reading many novels and not knowing that!

So, I'm wondering what is this relation between novels
& if you please give me some examples

Maybe be you hush can do that...(you seem like a smart one)..please

( I don't want to read many novels with out knowing these)

(ok! start answering ..now! you have one hour and half! No cheating!...heheh)

You could read again the category of post graduation to find the answer to your question. The relation between novels means the common theme or the common problematic tackled by different novels. We had discussed that before concerning an AF LIT topic and here's the link https://blida-english.bbactif.com/what-about-post-graduation-f19/african-literature-topics-discussed-t61.htm

I hope it will be helpful.