To get a real grasp of all this is quite hard. This is very subtle group theory that relies on already having a solid grasp of QFT.
This book tries to cover these topics but he didn't go into too much depth. I don't actually know of another book that goes deep into the topic besides Weinberg. Luckily, Weinberg covers this topic within the first ~15 pages of actual content in his book, so if you sit down and hammer it out after learning some QFT you could pick it up.