Ebook: Solving Ordinary Differential Equations I: Nonstiff Problems

I bought this book just because I have been using MATLAB's ODE function to simulate my physiological models. The MATLAB mannual recommend it. Although I found its content very useful for me, it is too much mathematics. Maybe it is the best book for mathematics major, but not for a non-mathematics major. As a Engineering major, I even find it difficult to read sometimes. I've got the book about two years, but have not finished to read it yet.