This is quite simply the best Biology A-level textbook on the market. It covers the core syllabus of most boards, plus many options as well, and all information is illustrated by some fantastic computer graphics and drawings. The explanations of biological principles are done so well that anyone can understand even the more complicated aspects of A-level Biology. It is also a great text for undergraduates in the biological sciences, especially since it has so much information gleaned from recent research (usually in separate boxes, so as not to disrupt teh flow of the main text). This is a great book.