Hello all. I am looking for a good book to bridge the gap between my undergraduate quantum mechanics and AMO specific topics. For my undergraduate quantum work I read through Griffiths, first volume of Cohen-Tannoujdi, and Shankar. I asked a couple of my professors and they recommended Theoretical Atomic Physics by H. Friedrich. Although the book does start off with something of a review it doesn't go into much detail on things I don't have experience with. For example resonance and channels are very important, but I have no idea how they relate if at all. I try to push through but eventually there are too many concepts I know too little about and I'm left defeated. My overall goal would be to learn more about RABBITT spectroscopy if that helps direct things at all. Is there a book or books that would fit in between? Thanks so much for any help.