These are the books that I have personally found very helpful in my journey - for you they may be different books. I've found that trusting my instinct has worked well for me. I take a real good look at anything that attracts me and while evaluating it I listed to my inner self and if it doesn't 'grab' me then I leave it. If it continues to keep my attention, then I read it or listen to it.
The following books can be found on Amazon in hard copy or kindle version. The top 2, I would recommend getting the hard cover as I have found it useful to highlight text that resonates with me so I can go back over it. The others I have used Audible so I can listen while driving or travelling. You might also find cheaper versions on sites such as Ebay, Book Depository etc so have a look at your normal suppliers as well.