The latest edition of Acta Macionica saw the light a couple of months ago, but I do not think I saw any announcements anywhere and it is not listed on the Ars Macionica website yet. When time comes I guess. If you are interested, just send them an email.
For quite a couple of volumes, the Acta is an impressive book. As we got used to, it contains a variety of essays in three languages. Most are in French, several are in Dutch and two in English. Since most are in French and that is not really my language, I fairly rapidly went through the 600+ pages.
There are a couple of very interesting texts, but also texts that are less of my interest. Most notable are the texts of Koenraad Logghe, Jan Snoek and Roger Degol.