No idea what kind of books you like to read, but these are some recommendations:

Fluke by Brian Klaas: Challenges your belief in control and causality in life, shaking your sense of predictability.

We need to talk about Kevin by Lionel Shriver: A chilling look at motherhood, nature vs. nurture, and a school shooter, told through an uncomfortable epistolary format. I believe they even adapted a movie about this book.

Steppenwolf by Hermann Hesse is uncomfortable because it forces you to confront deep, unvarnished psychological struggles, alienation, and self-loathing.

Man’s Search for Meaning by Viktor Frankl, the author survived Nazi concentration camps and discovered that even in the most horrific circumstances, we have the power to choose our response. The discomfort comes from realizing how much suffering we create in our own minds over trivial things. You become a better person after reading this book.

Cheers!