Looking to educate myself further, what should i read

So i just read a few book suggesties topics, but didn’t find what i’m looking for yet. After rabbit holing for the past few weeks, and oooh boy did i pick a right time to venture into this topic, i want to dive further into deeper theories on UFO’s in general, extra terrestial life, dimensions, visitations throughout history and how it all connects to life on earth. Theres a lot of credible sources and theres also a lot of woo and this sub has been such a help to check out more reliable information!

So if anyone had a good topical book recommendation for me that does cover some of the spiritual sides of the subject aswell but still stays grounded.

I also wonder if it’s still worth to read Coulthart’s “In plain sight” after watching most of his documentaires.

Thanks in avance!