You lost me at your screen name. It will not matter what book you buy if you maintain that attitude toward mathematics. If this attitude extends to your other academic efforts, or to your other family members, why even bother?
To your question:
I doubt that the book selection matters. If you decide to succeed, any collection of practice problems and a good, motivated tutor should prove sufficient.
GED is a good thing, but it is harder and less useful than simply graduating from high school. Recommendation to ALL who are contemplating dropping out of high school ==> Don't. Figure out why you are not succeeding -- maybe change your behavior -- fix the problem and graduate.