Go build something. Break it. Learn. Iterate.
Don't just skim the figures. Don't just Ctrl+F for the homework answers. Read the sidebars. Read the why behind the formulas. This book is old enough (5th Ed) to have legacy, but new enough to be relevant. It exists in that sweet spot where the tools have changed (CAD, FEA, 3D printing) but the principles have not. Design Concepts For Engineers 5th Edition Pdf
The 5th edition emphasizes iterative prototyping. In a world that worships efficiency, this is heresy. It teaches that the first design should break. It should be ugly. Why? Because failure isn't a bug in the engineering process; it is the compiler. A PDF on a screen can show you a finished bridge, but it can’t teach you the flutter in your stomach when your prototype delaminates. Real engineering is the courage to be wrong on Tuesday so you can be right on Friday. Go build something