[texhax] Getting the Index right and in the Table of Contents right

[Donald F. Nelson]

I'm at my wits' end. Let me list the relevant code of the book and point out the problem:
\documentclass{book}
\usepackage{makeidx}
\makeindex
\begin{document}
\frontmatter
\tableofcontents
\pagestyle{myheadings}
\chapter{Preface}
\markboth{book name}{Preface}
\mainmatter
\chapter{Blah Blah}
\markboth{book name}{Blah Blah}
text
\backmatter
\chapter{Index}
\markboth{book name}{Index}
\printindex
\end{document}
    I need the \chapter{Index} to get the Index in the Table of Contents and its ancillary command \markboth to get the page headings right. But it generates a blank page except for the title "Index" and enters that page in the Table of Contents. Then starting on the next page is the compiled index, also with a title "Index." 
   Can you help me? Thank you
Donald F. Nelson
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