Marginnote on left side only, using document class book with twoside

Question

I'm trying to use marginnote on document class book with twoside, but I can't see to get the margin notes strictly on the left. I don't want to be putting \reversemarginpar on all the odd pages. Can someone help me or direct me to help please.

Answer 1

You can use the etoolbox package to patch the \@mn@margintest command to set \if@tempswa to be always true and then issue a global \reversemarginpar:

\documentclass[twoside]{book}
\usepackage[centering,marginparwidth=2.5cm,paperheight=10cm]{geometry}
\usepackage{marginnote}
\usepackage{lipsum}
\usepackage{etoolbox}

\makeatletter
\patchcmd{\@mn@margintest}{\@tempswafalse}{\@tempswatrue}{}{}
\patchcmd{\@mn@margintest}{\@tempswafalse}{\@tempswatrue}{}{}
\reversemarginpar 
\makeatother

\begin{document}

\lipsum[1]\marginnote{test test test test test}
\lipsum[1-2]\marginnote{test test test test test}
\lipsum[1-2]\marginnote{test test test test test}
\lipsum[1-2]\marginnote{test test test test test}
\lipsum[1-2]\marginnote{test test test test test}
\lipsum[1-2]

\end{document}