Remove unnecessary blank page after creating an appendix

Question

• Declaring appendices, an unnecessary blank page is created immediately after. Leaving a 1-page break before the first appendix!?
• How can this blank page be removed.

• MWE below.

  \documentclass[twoside]{book} 
  \usepackage[toc,page]{appendix}
  
  \begin{document}
    \begin{appendices}
      \section{My first section}  
     \end{appendices}
  \end{document}
  

Answer 1

Add \makeatletter\@openrightfalse\makeatother to the preamble.