Julius M. Cruse & Robert E. Lewis 
Atlas of Immunology [PDF ebook] 

The Atlas of Immunology is a unique pictorial reference, containing more than 1000 illustrations depicting essentially every concept of importance in understanding immunology. Diagrams are included for all levels of understanding; there are some showing basic ideas and others providing a more detailed treatment for specialists. Illustrations in the Atlas range from photographs of historical figures to molecular structures of recently characterised cytokines, major histocompatibility complex molecules, immunoglobulins, and molecules of related interest to immunologists. No other book offers the breadth or detail of illustrated immunological concepts.