Most introductory books and articles I've found on Neural Networks expect prior knowledge in statistics and mathematics. They also tend to explain them in terms of a particular problem area or application (often before they have explained neural networks themselves - which is really confusing...:-)).
This book, on the other hand, explains all the concepts and background to Neural Networks in detail and explains the mathematics and application leading on from this. Which means if you are not used to reading mathematical formulae you can still get to grips with all the material, but also you'll get a more balanced view and understanding of design and application, in statistical, biological, physcal, and engineering contexts...
It's the best printed introduction to Neural Networks that I have found so far.