>I’m gonna buy the book but I prefer composition over OOP.

The GoF book (the design patterns book) says in a page right near the start, "Prefer composition over inheritance", in the middle of an otherwise blank page, presumably to emphasize the importance of that advice.

As others have replied, composition is one technique you can use in OOP, not something that is the opposite of OOP.

You can also use composition in non-OOP procedural languages like C, by having a struct within a struct.

https://www.google.com/search?q=can+you+have+nested+structs+...