u/KINOCreamsoda

I am looking for a fiction book where the protagonist simply grows and becomes a better or more intelligent person by the end of the book and as the main plot.

I think I would prefer a book that's written in the form of a diary or memoir, but I am open to anything.

A good example of this would be Flowers for Algernon, but this is more Scifi, I would like something more psychological and introspective with reflecting the dark or troubled past of the protagonist's past and how that helped them grow.

Thanks in advance.