What are you looking for in particular? There are several books available in market, for purchase and some free online documentation, targeted for various purposes. Since you posted this in certification forum, I assume that you are looking one for certification purpose.
As you might have seen in other threads, below are the resources people followed and following for completing the certification successfully.
1) Java webservices up and running.
3) Ivan notes (available in this forum)
4) Mikilai Zaikin notes.
5) above all, the threads in this forum.
Thanks for your reply. I just know what web services is. I want to buy book for developing
web services from base.
The books which were suggested above would help you in preparing for certification. Above that, these books would also help you in firming your knowledge in WS. However, in production there are several other implementations that are used, like Axis/Axis2 from Apache. You can refer their site for documentation. Axis2 is widely used implementation as far as I know. But for preparing SCDJWS, Metro is recommended.