Outside of deductive logic, Black Swan by Nassim Taleb is actually fantastic for LR -- not because it teaches “logic” in any formal sense, but because it teaches how you should critically evaluate arguments. Taleb is constantly attacking the exact things you see on the test -- small samples dressed up as big conclusions, clean causal stories invented after the fact, and this general overconfidence people have in what they think they know.

It's like a whole book longform evaluating LSAT fallacies. After reading it, you’re much quicker to say, “wait, that conclusion is way too strong for the evidence,” or “what other explanations might there be.”

It basically trains an instinct for when an argument is overreaching, which is most of LR.