Here's a link to a pdf of the book "Modern Magick" by Donald Michael Kraig: http://www.eso-garden.com/specials/modern_magick.pdf
And you can find the pdf for "Spells and How They Work" at http://www.scribd.com/doc/99676097/Spells-and-How-They-Work
Truly it only takes a bit of a search on Google to find such things.