It somewhat shocks me that I've never seen anyone recommend this before, considering what a beautiful book this was. Yet another sign to trust your instincts when it comes to everything, including which books to read. 
This is a kind of memoir written in letters to Akwaeke Emezi's friends, relatives, lovers, strangers, just people in their life, and it's so honest and visceral, and frankly, fascinating. I won't say it's changed my life, since my life is still the same for now, but it's probably one of the most inspiring and deep pieces of literature I've read so far, maybe that I'll ever read. It feels corny to call something deep, but I can't think of a better word. It does get dark at times, but not in a very morbid or excessive way. I know most of us have had similar feelings. 
With Pet I admired that they don't mind being brief, same goes for this one. It was also spellbinding to see how they use metaphorical and literal language, and blur the lines between the two; sometimes you can't tell if what's said is completely literal or if it's meant in an allegorical way, but honestly, I got so lost in the lyrics of this wonderful song that whether something was meant to be taken at surface level or required some interpretation didn't change much for me. It really made me think of Untitled God Song by Haley Heynderickx. I don't think a musical piece that is like, three minutes long, could encapsulate the entire text, but it reminded me of some aspects of it. 
Everything ends, including this book, but that doesn't mean we cannot mourn it.