For more information on forensic entomology, try the following two books:

Smith, K. G. V. 1986. A Manual of Forensic Entomology. Comstock Publishing Associates, Cornell Univ. Press, Ithaca, NY, 205 pp. (ISBN: 0-8014-1927-1).

Catts, E. P. and N. H. Haskell, eds. 1990. Entomology & Death: A Procedural Guide. Joyce's Print Shop, Inc., Clemson, SC, xii + 182 pp. (ISBN: 0-9628696-0-0).

The first is a technical hardback designed for professional entomologists; the second is a spiralbound aimed at the same audience, but shorter and with a popular style.