I was wondering if any of you know a good Cardiology textbook or book that's simple. I haven't taken any science classes; however, I have to learn basic heart physiology for something that I need to do. Stuff like what's is heart composed of and how it works, the cycle, etc. I went to the library to check out the textbooks but they are very confusing and complicating and require more science knowledge. Is there anything that's simpler?