Which books are good for JSP, Servlets, Ajax and JSON ?

Question

An introductory book will suffice because I need to know only about the basics.

Answer 1

For JSP/Servlet: Core Servlets and Javaserver Pages: Core Technologies, Vol. 1 (2nd Edition)

For AJAX/JSON : jQuery In Action (2nd edition)

I read both and feel good for the quality, might be also helpful in your case.

Answer 2

For JSP/Servlet: Head First servlets and JSP in one of my favorites.