Nazmul,
No, it is not enough. If you only get one book it better be "Applying UML and Patterns" 2nd edition by Craig Larman. That book I think brings out most of the major points. Read it over and over again and take the ICE exams.
Garth
Sun Certified
Java Programmer
IBM Certified Solution Developer for VisualAge for Java V4.0
IBM Certified Solution Developer for WebSphere Studio Application Developer 4.0.3
IBM Object Oriented Analysis and Design with UML (#486)