Here are a few things I want to share.
I recently got C. Lee Vermeers book Teagasca: The Instructions of Cormac Mac Airt (Faoladh Books). It’s a new translation of Kuno Meyer’s 1909 translation of Tecosca Cormaic with lots of insightful annotations. I haven’t finished it yet, but see this provides a contemporary understanding of these wisdom instructions that I find an improvement upon the translation published by Thomas Cleary (The Counsels of Cormac, 2004). Vermeers writes that there are at least seven of these “mirrors for princes” in Irish tradition, including The Testament of Morann and the Precept Teachings of Cú Chulainn, all of which he plans on doing. This is an excellent start.
And the second (corrected) edition of By Blood, Bone, and Blade: A Tribute to the Morrigan, published by Bibliotheca Alexandrina (they have a line of good books for polytheists), is out now. It’s a devotional anthology, and as once can expect there’s a wide range in terms of quality and insight, but the following essays alone make it a worthwhile buy: P. Sufenas Virius Lupus’ “The Morrigan and Cú Chulainn: A More Nuanced View of Their Relationship” and eir “The Morrigan, Alecto, and Lamia: Irish Deities and Interpretatio Hibernica of Classical Myth”; and “Musings on the Irish War Goddesses” by Saigh Kym Lambert, which among many important elucidations of the matter of An Morrigan and related deities, also provides a corrective to much of the nonsense about Cú Chulainn and the Great Queen (usually along the lines of she wanted to punish him for not having sex with her).
And this came out back at summer solstice: Interview with Rebecca Buchanan at Eternal Haunted Summer about (mostly) From The Prow of Myth.