spinnachie
I'd recommend The New Compleat Astrologer by Derek & Julia Parker. (Minderwiz, my apologies if that's what you meant by "Parker's Astrology.")
The website astro.com, already mentioned, has a lot of valuable information, for free, in addition to its ephemeris and chart-calculation tools.
Also, check online to see if there's a local astrological society or meet-up (check meetup.com) or simply classes taught by local astrologers. Real-life people will have real-life books that they might be happy to lend to you.
I'd hold off on buying software until you're completely facile with using and interpreting the charts offered on astro.com. Astrology software is pricey, imho, and not needed unless you're turning pro.
yes I won't be buying any of the software just yet...i have looked online and i agree it is way to pricey for someone who is just dipping her toes in for now