The Latin word for life story, say 'vita fabula', is not really used as it is in modern English. But its influence is there. English has borrowed a lot from Latin. For instance, the idea of a narrative about someone's life, which is what 'vita fabula' represents, is expressed through words like 'biography'. Also, Latin roots give us words like 'vital' which is related to 'vita' and implies something crucial to life. And when we look at words like 'fable' related to 'fabula', we can see how the concept of story - telling has evolved from Latin. It's all about how Latin has seeped into the English language over time.
The Latin word for 'graphic novel' could be 'liber graphicus' (though this is a bit of a constructed term as there may not be a single, traditional Latin term precisely for 'graphic novel').
Well, to be honest, I'm not sure exactly what the equivalent of 'fiction' is in Latin. But usually, words like this have roots that suggest imagination or creation.
I'm not entirely sure as I haven't read it specifically. But it might be a story in Wheelock's Latin materials that relates to the concept of a good life in the context of Latin culture or language study.