Soul chips!
Yeah, WotMW. I'd try to ask for two, for IQ and EQ. One that has at least 2~3 times the logical capacity and data processing of Tatsuya Shiba. The other is basically a support tool when it comes to reading/learning about people that focuses more on EQ, John H. Watson, Euphemia li Britannia, and Lelouch vi Britannia as base.
Then if I can still add something, maybe the deductive reasoning of Sherlock Holmes and Shinichi Kudo.
Also that it is undetectable and have no way to separate from me even by the one that's gonna grant it.
If you're reading this and don't get why I'd wish for this... dunno. A system is good but, I'd feel much better if I can be as capable as I could with just me. Since it is literally part of myself/my soul.
If you kinda get it but feel that somehow something is wrong, I just blame it that I couldn't find the words to convey my thoughts accurately.
Again, not a book, not an author. haha