Hello drew, and good day to you.
Thank you for asking about Noahidism, I'm certain HaShem desires of you to know him as best you can. I have read "The Path of the Righteous Gentile", and will state that for an individual who knows nothing about Noahidism and worshipping the one true G-d of the Universe this is a fair start. I believe the book is available for free somewhere online; I'll see if I can locate it for you.
If you'd like to purchase a book I feel is superior to Paldiel's publication, might I suggest you purchase
"The Rainbow Covenant: Torah and the Seven Universal Laws" by Michael Elias Dallen. I feel it's the best introduction on the topic of Nohadism in print I've ever read.
I remind you that all of this is just a start. Trust me, once begin to comprehend the beauty of a real relationship with the Creator of the Universe you won't want to stop. May HaShem continue to bless you and guide you on your journey. And take a look at asknoah.org where you might find some more helpful information.