Michele Shuster, Janet Vigna, Gunjan Sinha, "Scientific American Biology for a Changing World with Core Physiology"
English | ISBN: 1429297026 | edition 2011 | PDF | 713 pages | 108,7 mb
I'm using this as a textbook for my introductory biology class. So far it is pretty interesting. The authors seem to try to teach through story telling and visual aids, so it's not extremely technical. The pictures and diagrams are vivid, relevant, and interesting.