Used those 2 little books, many times.
Defense-wise, they just mimic a watered down version of G.D.
Peter Carroll has some stuff good, like Seth, for the mage who likes PSI combat. (that's all I will say about that lol)
Getting rich- it will take you to the 'almost' worked 100%
You might find $10
You 'might' get a great job off, but for some reason, it 'poofs' out, and get a mediocre job.
You meet a 'hot girl', but find out she has 15 kids and more baggage than makes her worth it.
I spoke to others about this, and it seems like the 'results' are watered down, deliberately.
(I'm sure a couple of people here, will understand exactly why this happens)
As far as "crushing your enemies", it might give them a flat tire or fender bender.
They might lose their wallet.
Inconviences, yes, - hardly 'crushing', though.
If you do it 'until they are crushed', it might (most certainly!) backfire.
Black magick is - do it right, first time!- and GET OUT OF THERE!