It discusses holistic information about mammalian endocrinology, and more particularly, about human endocrinology. The text reviews the basic concepts and the scientific understanding of each of the major endocrine glands. Each chapter has been written with a view that a beginner may easily comprehend the subject matter. Endocrine methodologies, wherever appropriate, have been incorporated in chapters, and similarly medical aspects of endocrine or harmonal disorders resulting out of mutational changes in hormone receptors are included, to make the text more interesting. Coverage of topics includes Cell signalling and the mechanism of action of hormones Chemical structure and classes of hormones Reproductive endocrinology Behavioural endocrinology Environmental endocrinology