The first link is Crowley's philosophy, the second is the backbone textbook of his system, the third is the syllabus for his order A.'.A.'. and all the texts except the temple ceremonies can be found online.
The Golden Dawn was a major influence of A.'.A.'. and certainly reading any text written for or by that order's members is great for either system, however, there are of course differences here and there, these are much more technical and in my opinion only pertinent to actual initiates of either order who have gone through the work and experienced the initiation ceremonies.
In terms of practical advice Liber E is a good place to start, and also Liber O, these are the backbone of the system, however, you may want to read into other sources as these were written as notes to be expanded upon by one's superior in the order.
Other names to check: Regardie, Cicero(s), Nick Farrell, Dion Fortune, James Eshelman, and David Shoemacher.
David Shoemacher's "Living Thelema" is perhaps the best beginners introduction to Crowley's system out there which I have come across and covers the techniques of Liber E and O and then some more to boot. It's cheap too.
If you have any questions I am also open to discussion.