The book addressed several critical issues in application of antibodies and immunoassays for food safety. (1) Methodologies for the enhancement of sensitivity, rapidity, and reliability; (2) eliminating food matrix effect; (3) exploiting high-quality antibodies and new specific recognition elements, such as bispecific monoclonal antibody, broad-specific antibodies, and single chain antibody fragment (scFv) mutants; (4) preparing stable and strong signal labels to improve the accuracy and sensitivity of immunoassays; (5) multiple detection abilities as inevitable trends in the immunoassay development, etc.