The Art and Practice of Astral Projection
The Art and Practice of Talismanic Magic
The Art and Practice of the Occult
The Art and Practice of Getting Material Things Though Creative Visualization (hc, a note signed as Edward Peach and Ophiel and a set of sigils in March 1974)
The Oracle of Fortuna
I purchased a lot of 64 books back in the 1990's out of alt.magick on usenet for $600 that was way way underpriced even then and expanded my mind much.
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Ophiel's writings authored in 60s and 70s are readily accessible when compared to most occult eclectic writings.
Lon Milo DuQuette writes contempory sc books, albeit thelemic, that are entertaining and readily accessible eg "Angels, Demons and Gods of the New Millennium", etc.
http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Dstripbooks&field-keywords=Lon+Milo+DuQuette&x=15&y=22