Today, our world increasingly is conceived of as being molecular. An ever widening range of phenomena are described logically in terms of molecular properties and molecular interactions. The majority ofknown molecules are heterocyclic and heterocycles dominate the fields ofbiochemistry, medicinal chemistry, dyestuffs, photographic science and are of increasing importance in many others, including polymers, adhesives, and molecular engmeenng. Thus, the importance of heterocyclic chemistry continues to increase and this three volume work by Drs. R. R. Gupta, Mahendra Kumar and Vandana Gupta is a welcome addition to the available guides on the subject. Its scope places it in a useful niche between the single-volume texts and monographs ofheterocyclic chemistry and the multivolume treatises. The authors have retained the well tried classical approach but have succeeded in placing their own individual spin on their arrangement. They have put together a well selected range from among the most important ofthe vast array of facts available. This factual material is ordered in a clear and logical fashion over the three volumes. The present work should be of great value to students and practitioners ofheterocyclic chemistry at all levels from the advanced undergraduate upwards. It will be of particular assistance in presenting a clear and modem view of the subject to those who use heterocycles in a variety of other fields and we wish it well.

1. Introduction

2. Five-Membered Heterocycles with One Heteroatom
3. Benzo-Fused Five-Membered Heterocycles with One Heteroatom
4. Five-Membered Heterocycles with Two Heteroatoms
5. Five-Membered Heterocycles with More Than Two Heteroatoms
6. Meso-lonic Heterocycles.