This page (and menu tab) is for single anthologies, not yet part of a series.
The first book produced this year is Insignia 2020: Best Asian Speculative Fiction. This may be developed into a series in 2021 if there’s enough interest, however the format/criteria is likely to change.
Added November 2020: An ebook collection of the flash stories and poems featured in Horror Matsuri 2020 is now available.
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