can anyone recommend me good book's on kant's philosophy? a concise compilation of his main ideas? a good intro / companion to his works?
There are better Philosophers out there
This is kinda hard OP.
your best bet is to go to the standford wiki and try to get as much as you can
the (mad)man wrote a lot about many things (espitemology, ethics, aesthetics, etc...), and that's why he is both complex and rich in content, so trying to make a concise compilation is kind of hard since you are very suceptible to fuck things up on some point.
try to check as many youtube videos or introductory classes about Kant as you can, and when you feel you 'get' some ideas, go read the Critique of Pure Reason and then the Critique of Practical Reason. These 2 are his biggest and most imporant works.
If you understand these two, the rest of his works should be very easy for you.
what about something that talks about the motive of an action? I'm interested in looking up to what extent the morality of an action depends on the motive of the agent performing it
Then read the Critique of Practical Reason
the whole system behind the Imperative Categorical is too complex to be read without understanding Kant's Deontological ethics as a whole.
As a helper, he would say that the motivation is not as important as the act itself, he centers his focus on the act, not what's before of after.
Yes, you can read him and be safe.
He does some intellectual black magick right in front of your eyes sometimes, but if you think hard enough about it, it should make sense, eventually.
You don't skip shit fuccboy
You get inspired by the work of them and notice how the same ideal keep coming back into philosophy.
There's a (thin) link between people like Aristotle and Wittgenstein