I just want to let you know about my site; it offers completely free eBooks in PDF, EPUB and Kindle formats. The ones available in all three formats, I do myself, so they are quality books. The rest (about 15%) are scanned original PDFs.
I add books every single day and the subjects are wide ranging. I do have a good selection of Esoteric and Occult books up there, and I'll give the link to that section:
I hope you find something useful :)