There are a few posts on BP already about this topic with book recommendations listed. It really depends on what area you want to focus on first. "Mind Set" related books are usually the first level, then "General Concept" type books that cover the realm of investment ideas. Once you have figured out your area of concentration there are recommendations for books in each of those. I am currently focusing on BRRR investing so reading a lot about rehab and financing. Then I will pick up a new "Mind Set" book every once in a while to keep the passion alive. Best of Luck