I'm still in high school and looking at majoring in physics in college. I have taken math up to single variable calculus, but I want to go back and relearn algebra and geometry to get a much better understanding of those subjects. I'm considering using the books Algebra by I.M Gelfand and Geometry: A High School Course by Serge Lang. From what I've seen, these books are more focused on actual problems versus just exercises and focus more on proofs than just plugging in numbers. Can anybody else who's read these books give a second opinion or recommend any other good books at the high school level?