Looking for a non-religious book to help me through my existential crisis

I’m a 35F and have been through more than most in my years. I can no longer work and no one else in my life has dealt with the same darkness and hopelessness that I have so they aren’t easy to talk to.

Between my severe disabling illnesses and late AuDHD diagnosis, I have found myself a misunderstood, lonely, nihilistic atheist who is struggling to find reasons to carry on and find a purpose in my suffering.

I’m looking for a *non-religious* book to help me through this crisis. Also, darker books are fine – sometimes the darkness makes me feel more understood.

Thank you!

by mydogisagoblin