Rabbi’s books

Thank you very much for the wonderful content. I listen and enjoy it. I think this site where you can ask questions deserves great appreciation for the attention and investment of time, so thank you.
I saw some of your debates on YouTube and was very impressed. I would have been happy to expand and I saw that you have books. I am interested in the topic of the existence of God, but I am not used to philosophical or scientific concepts (I think I will understand the ideas). Is there a book of yours in easy language that you could recommend?
And another thing, I heard a debate by the Rabbi and they discussed there the evidence from planning. I tried to listen to it several times before I asked, but the question is this: If we assume that there is a being like that who planned the world, but of course we have no understanding of it, how can we conclude that it is interested in something or even conclude anything about it if there will still be things that we will have to say that we have no understanding of it? Thanks in advance.