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ghb,
If you do a lot of work on EM simulations, it might be worth getting the book.
As I said, it explains the practical use of commercial EM simulators, including MoM, FEM, FDTD, a little bit of TLM. Especially excitation and deembedding algorithm is a critical part of commercial EM simulators, and you really wanna know before you use any tools. Combining this book and EM tools' manuals should provide good understanding of that part.