One of the most knowledgeble dermatologists is Dr. Leslie Baumann. I haven't read this book yet, The Skin Type Solution,but have not doubt it's should be good.
This has nothing to do with LOA but I’ve struggled my whole life with acne. This book changed my skin! Give it a read.
The Skin Type Solution: Are You Certain Tthat You Are Using the Optimal Skin Care Products? Revised and Updated https://www.amazon.com/dp/0553383302/ref=cm_sw_r_cp_api_i_1MtxBb9241B84