I have read Prof. Morris Kline's Calculus: 'An Intuitive and Physical Approach'. I loved the book. I want to learn more with a view towards understanding some elementary quantum mechanics, Electronics and Fourier transform NMR spectroscopy. Could you please suggest some books that would teach me differential equations and fourier transforms? (i.e)some book that teaches these concepts using 'An Intuitive and Physical Approach'? Thank you.