Different header for odd and even pages in LaTeX fancyhdr

Question

We are making a book with the document class 'book'. We used the fancyhdr package to customize the headings. We want the book title on LE and the chapter name on RO. We tried

\usepackage{fancyhdr}
\pagestyle{fancy}
\renewcommand{\chaptermark}[1]{%
       \markboth{#1}{}}
\renewcommand{\sectionmark}[1]{%
        \markright{\thesection\ #1}}
%\fancyhead{} % clear all header fields
\fancyhead[LE]{This is book title}
\fancyhead[RO]{\emph{\thechapter}}

but now the title is overlapping with the chapter name in the header in odd pages. How can I solve this?

Answer 1

Have a look over here, section "Selectors". That should let you do something just for odd or even pages.