This is really cool - how did you develop the background knowledge to solve this? I'm trying to learn more about low-level stuff and I would have no idea how to approach solving a problem like this
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It won't help you with PowerPC, but the chapter list is: x86 and x64, ARM, The Windows Kernel, Debugging and Automation, and Obfuscation.
The book was written in 2014, so it should be reasonably relevant for modern purposes, and especially so if digging into any software older than 2014.