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I have recently started a book on QFT: A First Book of QFT by Amitabha Lahiri and Palash B. Pal. It is very well written until the chapter of renormalization, where, before correcting the ultraviolet and infrared divergences, the book itself diverges, and I couldn't make meaning out of what they were writing. So I shifted to the Particle Physics book by Palash Pal. Keeping in mind what I have read from the previous QFT book, I can understand what is being taught in the book.

Now the point is, this is a particle physics book, and it might not go very deep into the theory ("might" because I haven't studied the whole book). So, I will have to study QFT from at an advanced level as well. For example, the Path Integral approach was not covered in the QFT book, so I have to read that from somewhere.

From what I have read online, I found that Schwartz and Peskin & Schroeder are quite recommended. I have attached the contents pages of the QFT book that I have studied (I haven't yet studied the last two chapters). Any suggestion other than these two books?

Another question: it is well known that notation differs from book to book to quite a large extent. Any general advice on how not to get lost when changing over from one book to the other?

Now the point is, this is a particle physics book, and it might not go very deep into the theory ("might" because I haven't studied the whole book). So, I will have to study QFT from at an advanced level as well. For example, the Path Integral approach was not covered in the QFT book, so I have to read that from somewhere.

From what I have read online, I found that Schwartz and Peskin & Schroeder are quite recommended. I have attached the contents pages of the QFT book that I have studied (I haven't yet studied the last two chapters). Any suggestion other than these two books?

Another question: it is well known that notation differs from book to book to quite a large extent. Any general advice on how not to get lost when changing over from one book to the other?