Hi! I've bought book Feynman lectures, Feynman exercises and Physics Jay Orear. Is worthwhile to buy Landau and Lifshitz books? I'm beginner in physics. I'm not sure what to school textbooks. School programme is too easy for me. I need more accurate source to learn physics. Although in my school math teacher think that square roots from negative numbers doesn't exists and if delta is negative, then equation doesn't have any solutions. What do you think about Feynman lectures, Jay Orear Physics, A.S. Davydov's books, L.D.Landau's & Lifshitz's books and Resnick & Halliday Physics?