Preface Inclusion of the material on drug delivery systems is organized based mainly on the uniqueness,originality,and potential application of the basic research toward commmercialization and ultimate product introduction into the mar- ket.Ev ery r searched ex 22a although it merits inclusion- voluminous book on each subject.This is beyond the intention or scope of this book,which is meant to serve simply as an introduction of a particular area to a researcher who is not an expert but would like to "get to know" ofrea of interest.The reader is requested to understand the background of th he or she attempts to form an opinion on the subject matter presented. In this second edition,every attempt is made to include material pub- lished between 1995 and 2002.The content has been expanded to provide integrated coverage of the topics in the first edition and to introduce the reader to new topics of general scientific interest. The authors thank all their associates for their continued support during the preparation of this bookPreface Inclusion of the material on drug delivery systems is organized based mainly on the uniqueness, originality, and potential application of the basic research toward commmercialization and ultimate product introduction into the mar￾ket. Every researched example in a particular delivery system is not included — although it merits inclusion — because such an effort would result in a voluminous book on each subject. This is beyond the intention or scope of this book, which is meant to serve simply as an introduction of a particular area to a researcher who is not an expert but would like to “get to know” an area of interest. The reader is requested to understand the background of the production of this book before he or she attempts to form an opinion on the subject matter presented. In this second edition, every attempt is made to include material pub￾lished between 1995 and 2002. The content has been expanded to provide integrated coverage of the topics in the first edition and to introduce the reader to new topics of general scientific interest. The authors thank all their associates for their continued support during the preparation of this book