This book is a good though outdated overview of the investment banking business. I would also strongly recommend instead or in additionthe Vault Career Guide to Investment Banking.... The Vault guide includes moredetailed overviews of all the departments and functions of an investmentbank including corporate finance, M&A, sales, trading, private clientservices, credit, etc. If you are a job seeker in investment bankingalso try the Vault Guide to Finance Interviews, which contains actualinvestment banking finance interview questions and answers and which Ifound to be enormously valuable in my Wall Street job search.