As the world becomes more complex, a greater percentage of the present litigation is based upon very technical subjects. More and more chemicals are being introduced into our daily lives, without ever having been tested for possible side-effects. Consequently, product liability is increasing, and more and more often the toxicologist is being called into court to explain to judges and juries the concepts of technology and risk assessment. The Toxicologist As Expert Witness: A Hint Book for Courtroom Procedure is written with the toxicologist in mind who may not have the experience to testify at a time when toxicolgists as expert witnesses are in great demand.