I know many PCB Designers and Product Designers experience issues with electromagnetic compatibility, particularly understanding why some products fail and the fundamental principles behind it.
This book will explain the 'why' and the 'how,' and it's completely free to download.
Here is the link to download the book:
Hope you enjoy it.
Dario
By the way, if your goal is to become a PCB expert, if you want to design boards right the first time, and if you want to understand why some designs fail in the first place, then you need to check this out: