The FreeCAD 0.20 Black Book is the 3rd edition of our series on FreeCAD. This book is written to help beginners in creating some of the most complex solid models. The book follows a step by step methodology. In this book, we have tried to give real-world examples with real challenges in designing. We have tried to cover most of the topics utilized in industries for designing. The book covers almost all the information required by a learner to master the FreeCAD. The book starts with sketching and ends at advanced topics like Path (CAM), and FEM (Simulation). In this edition, we have added tools of addon workbenches like Sheet Metal, CFDOf, Assembly4, and so no. Some of the salient features of this book are: In-Depth explanation of concepts Every new topic of this book starts with the explanation of the basic concepts. In this way, the user becomes capable of relating the things with real world. Topics Covered Every chapter starts with a list of topics being covered in that chapter. In this way, the user can easily find the topics of his/her interest easily. Instruction through illustration The instructions to perform any action are provided by maximum number of illustrations so that the user can perform the actions discussed in the book easily and effectively. There are about 2012 illustrations that make the learning process effective. Tutorial point of view At the end of concept's explanation, the tutorial make the understanding of users firm and long lasting. Almost each chapter of the book has tutorials that are real world projects. Moreover most of the tools in this book are discussed in the form of tutorials. Project Projects and exercises are provided to students for practicing. For Faculty If you are a faculty member, then you can ask for video tutorials on any of the topic, exercise, tutorial, or concept. As faculty, you can register on our website to get electronic desk copies of our latest books. Faculty resources are available in the Faculty Member page of our website once you login. Note that faculty registration approval is manual and it may take two days for approval before you can access the faculty website.