The presence of actinomycetes in this world is, omnipresent. They are an important source for producing biologically active compounds than the other microbes. Many antibacterial, antifungal, antiviral, antihelminthetic, anti-tumour compounds have been isolated from the actinomycetes. Actinomycetes can be an effective source of drugs with novel chemistry and promising potential. I assure you that this book could help new dimension to gain basic knowledge about actinomycetes. I thank all the researchers those who did wonderful work with this emerging field for better drug delivary and also for their contribution to our society.