This book is fantastic and completely worth the money.
I also recommend the anatomy coloring books, and surprisingly, if you search Pinterest there are a lot of really nice charts and pics.
My favorite resource for palpation is Trail Guide to the Body. It has really good pictures and walks through how to find land marks. I’m not sure if there are online resources for this particular series but here is the Amazon link.
I see a guy that does trigger point work, told me to get this book https://www.amazon.com/Trail-Guide-Body-Locate-Muscles/dp/0982978650/ref=sr_1_1?ie=UTF8&qid=1537202882&sr=8-1&keywords=trail+guide+to+the+body+5th+edition Shows trigger points, shows pain areas and the muscles that cause the pain and how to release them.