I see you’ve already got 7Sage, so I’m assuming you’re looking to supplement. This is one of the only things I recommend them for, but the Powerscore LR book is actually pretty good for intro basics. LSAT Trainer is also solid on LR.
LSATHacks, Powerscore, and Manhattan Prep all have full explanations for RC and LR that I find immensely helpful as a supplement to 7sage explanations :) That, and fellow 7sagers!