What is legal on GitHub? The author, Matt Weisfeld, maintains a repository called weisfeld/thought-process-5e which contains all the source code examples from the book. You can clone this, run the Java/C#/Python examples, and learn alongside the book. That is 100% permitted and encouraged.
Addison-Wesley (now part of Pearson) sells the eBook directly on InformIT.com. However, wait for sales. Pearson runs "$10 eBook" promotions every few months. Set an alert on Slickdeals or Reddit’s /r/ebookdeals. What is legal on GitHub
Weisfeld argues that procedural programming focuses on "verbs" (do this, then that). Object-oriented programming focuses on "nouns" (the customer, the invoice, the repository). Shifting your mental model from functions to objects reduces bugs, improves code reuse, and makes complex systems manageable. Addison-Wesley (now part of Pearson) sells the eBook
Many public libraries subscribe to Safari Books Online (O’Reilly Learning Platform) or EBSCO eBook Collection. If your library has access, you can "borrow" the PDF digitally for 7–21 days. improves code reuse
Object-oriented analysis and design (OOAD) is a software development approach that involves analyzing and designing software systems using object-oriented concepts. OOAD involves identifying the objects and classes that make up a system, and defining their properties and behavior.