I'd probably check out at least two or three:
(1) For the EJB portion of J2EE check out Richard Monson-Haefel or Ed Roman's book.
(2) For the Servlet/JSP book, check out Marty Hall's Core
Servlets and JavaServer Pages.
(3) After you've read the intros RUN out and buy both "Core J2EE Patterns" by Deepak Alur, et. al and "Patterns of Enterprise Application Architecture" by Martin Fowler. They show you how to actually use what the others talk about.
Kyle