I have the same question as many others, which hasn't been thoroughly answered. I have an extra blank page between Appendix 1 and Appendix 2 (which is a figure).
I have tried:
which I tried in the preamble, right before the first appendix, and right before the blank page. None of these worked. (Although I get an error message with
\makeatletter\@openrightfalse\makeatother). Does anyone have another idea, perhaps something that works generally and not just for books?