Books with strong platonic relationships

I have been fixated on Project Hail Mary the last month and realized I need more stories that prioritize friendship and other platonic relationships. I am open to books with romance elements (outside of the friend relationship) but for the purposes of this post, I'd prefer a stronger focus on the platonic relationship.

I am open to any genre, though I am particularly fond of fantasy and horror. I am also open to non-fiction, though I'd prefer it feel more like a story than a history lesson. Thank you in advance for any suggestions!