Dr. Alan Gunn is senior lecturer and Zoology Programme Director at the School of Biological & Earth Sciences, at John Moores University. He has written numerous papers on parasitology, the biology of blowflies, the physiology and behaviour of agricultural pests and ecotoxicology, and develops computer based learning tools to support his teaching in these areas. He is interested in the effectiveness of enquiry-based learning as a means of enhancing student performance and has written several papers on this topic. This is his first textbook.