sed & awk Book

Hi Experts,

I am studying SED and AWK text processing commands with an E-book. I am not satisfied with the way of explanation and examples given by them.

I would like you guys to suggest me the Best book for SED and AWK to become good in this utility.

Thanks in Advance

What is the title of the book you are using? The de facto standard is
'sed and awk' Arnold Robbins.
http://www.amazon.com/sed-awk-Pocket-Reference-2nd/dp/0596003528/ref=sr\_1_1?s=books&ie=UTF8&qid=1384169967&sr=1-1&keywords=sed\+and\+awk

What does your ebook lack? Syntax, examples?