Bit of an odd question, but I’m genuinely curious if you have come across a novel that gave you an ‘aha’/lightbulb moment. When I (F23) was in hospital for an ED ten years ago, my psychologist gave me four novels to read that helped me start recovering. They were “The Little Prince”, “The Velveteen Rabbit”, “Life of Pi”, and “The Old Man and the Sea”. 
I’m battling quite a bit seeing the light at the end of the tunnel with a bad depressive episode and really searching for meaning.