Learning and understanding classification systems is an integral part of the surgical curriculum and training. They are also common topics for quizzing during ward rounds, in theatre and in exams. Most surgical textbooks will describe some of the classification systems relevant to the topic in discussion, but this is often lost in the depth of the text. The need for such a book is evident by the fact that trainees often have to spend time compiling their own classification lists prior to ward rounds and exams. This is time consuming, thus the lists are generally incomplete and sometimes incorrect. This is the first handbook aimed at junior surgeons, bringing together clinically relevant classification systems in a clear and easily read format. With the present increased attention towards measures to improve quality of surgical training, we feel such a book would be an essential aid at the present time.