Your course textbook can be accessed via the DART eBook link in the Getting Started module.
Text:
Horstmann, C. S. (2018). Big C++: Late Objects (3rd ed.). John Wiley & Sons.
Read:
Chapter 9 - Classes
The textbook reading is essential for learning new concepts, seeing how language features are used, and understanding the motivation for programming with these concepts. The lecture clarifies these concepts but cannot fully introduce and explain them.