This highly readable text remains 'the best of the immunology primers'. It is lavishly illustrated in full colour to make the illustrations even easier to understand. The book also contains suggestions for further reading, a detailed glossary of terms and abbreviations, and menus of contents that begin each chapter. A supporting web site at www.roitt.com contains self-assessment questions and answers combined with other useful lecture resources such as updates, further reading and image archive. The text has been extensively updated by Ivan Roitt with the help of a new co-author and outstanding teacher of Immunology, Peter Delves from UCL