A Complete Guidebook on Biofilm Study has emphasized the biofilm-related issues in the present context related to research and development. For this purpose, experimental design and relevant experimental protocols for the biofilm studies have been highlighted here. In addition to that, inhibitors from natural or synthetic sources against microbial biofilm development have been addressed. This approach has been further substantiated by bioinformatics as well as nanotechnology-based reports. Both, the image processing related to biofilm study and the characters of substratum associated with biofilm development have also been included for a better understanding of the beginners in this field. Further, how biofilm helps and/or hampers in food processing and waste management system, that discussion has been considered in this book. Similarly, human benefits from biofilm and reverse of it have also been included considering host-pathogen interaction, immunity aspects, and others.