This is a re-written edition of a classic work known as The Blue Guide. The first edition of the book appeared in 1985, and was based on a workshop held in Marseille in July 1983. That workshop which had brought together the Commission on classification and Terminology of the International League Against Epilepsy, and an international group of epilepsy experts, was an important event in the development of an international classification of epilepsies and epileptic syndromes (ICEES)."