pdflatex: Combining Multiple .pdf Files

A real example.

\title{The Essential C Notes}
\author{
\url{http://www.acm.uiuc.edu/webmonkeys/book/c_guide/}
}
\date{\today}
\documentclass{article}
\usepackage{grffile}  %to treat the spaces in the file name%
\usepackage{pdfpages} %the package to do the combination job%
\usepackage{hyperref} %for the hyperlink%
\begin{document}
\maketitle
\includepdf[pages=-]{C Guide--1.pdf} %pages=- means all the pages%
\includepdf[pages=-]{C Guide--1.3 function.pdf}
\includepdf[pages=-]{C Guide--1.4 pointer.pdf}
\includepdf[pages=-]{C Guide--1.5 operators.pdf}
\includepdf[pages=-]{C Guide--1.6 statements.pdf}
\includepdf[pages=-]{C Guide--1.7 preprocessing.pdf}
\includepdf[pages=-]{C Guide--2.12 stdio.pdf}
\includepdf[pages=-]{C Guide--2.13 stdlib.pdf}
\includepdf[pages=-]{C Guide--2.14 string.pdf}
\includepdf[pages=-]{C Guide--2.15 time.pdf}
\includepdf[pages=-]{C Guide--2.7 math.pdf}
\includepdf[pages=-]{C Guide--Appendix A ASCII Chart.pdf}
\end{document}