another one - interview advice

To prepare for internship interviews I've worked through the book "Investment Banking" by Rosenbaum/Pearl and honed my Excel and PPT skills. Would you advise to additionally study one of the interview guides? I skimmed through one of them but had the impression that quite a few things are too simplified (if not wrong) and may lead to mixing things up too much. In general, I've the impression that I managed to internalize the vast majority of the Rosenbaum/Pearl's content, however, think it might be like reading a book for an exam without rehearsing mock exams (i.e. you may understand the concepts but will perform badly as you weren't prepared on how questions might be asked).