I am going to preapre for Web Component Developer Certification exam (Exam1Z0-894 : Java Platform, Enterprise Edition 6 JavaServer Pages and Servlet Developer Certified Expert Exam ), so please someone let me know which book is appropriate to study for this exam (1Z0-894).
No, but can always start with Head First second edition and then go to study the specifications. There are some people here who have done it. Read their story on the Certification Results