Applied Mathematics by Example: Theory
This is a free, online textbook that can be downloaded as a pdf. ISBN: 978-87-7681-624-7 - According to the website, "Mathematics is an exceptionally useful subject, having numerous applications in business, computing, engineering and medicine to name but a few. `Applied mathematics’ refers to the study of the physical world using mathematics. This book approaches the subject from an oft-neglected historical perspective. A particular aim is to make accessible to students Newton’s vision of a single system of law governing the falling of an apple and the orbital motion of the moon. The book and its associated volume of practice problems give an excellent introduction to applied mathematics."