3D CAD Mechanical Exercises is a book written by Novafel to help students learn AutoCAD software. The book contains over 300 self-practice exercises that are suitable for beginners and advanced users. AutoCAD is a computer-aided design software that is widely used by engineers, architects, and product designers to create technical drawings. The software offers several advantages over manual drawing, with higher accuracy and productivity being some of them.

The book simplifies the tedious traditional drafting and detailing tasks through the use of many geometric construction tools such as grids, snap, trim, and auto-dimensioning. It is a comprehensive guide that can help you learn AutoCAD and other CAD software such as SolidWorks, Inventor, SolidEdge, etc. The author has been teaching AutoCAD for the past ten years and has observed that the most effective way to learn AutoCAD is through practice. The book is free and can be downloaded from the author's website.

Overall, 3D CAD Mechanical Exercises is an excellent resource for anyone looking to learn AutoCAD and improve their skills. The author's goal is to help you achieve your goal, and you can always contact him via email for any questions or clarifications.