Are there any books that teach programming without classes and other bloated stuff? Maybe books aren't even needed and practice is all you need?

It is called C. You just write C code. And if you really need - compile it with C++ compiler to use some features of C++ you find useful, for example, maybe function overloading.

Are you watching the Handmade Hero series? That is where you can learn what you want. If you are having trouble learning from video, Casey is working on a written version starcodegalaxy.com.

I haven't seen any books that teach C the Casey way:

• Compression oriented programming.
• Zero is initialization.
• Instead of C++ inheritance, use one big struct, and a big switch statement in big functions for the different entity types. If memory usage becomes a problem, compress the entities that aren't being updated or drawn.
• Make a different platform layer for each operating system your program is used on.
• Don't use the standard library, make your own.
• Pre-allocate all memory that will be used at the start of the program. No need to free the memory when the program exits. The OS will do that for you.
• Put the platform code in the exe part, and the game part in the dll, so you can have live looped coding.
• Use a simple build system using shell scripts.

The series and this forum are a gold mine. Go to the beginning and start reading.

I can post some external links that helped me, but I would have to go hunting for them, so I'll only get them if you really want them.

Speaking for myself, I like using ANSI C because it compiles faster than C++. However, I assume it is missing some features that Casey needs.