Hi, I am looking for textbooks in relativistic quantum mechanics and group theory. I have just finished my undergraduate studies in Physics and am looking to specialise in theoretical high-energy physics. Therefore, textbooks in relativistic quantum mechanics and group theory suited for that field of study would be most helpful. On the top of my head, I can think of Sakurai, Merzbacher, Shankar, but don't they carry extra baggage that are not really useful for a practicing high-energy theorist? Also, I am thinking of learning group theory from Bincer and Georgi. Thoughts?