I’m currently working full blast on the remaining two chapters (and epilogue) for ‘Liath Luachra: The Metal Men’ but the book is now available for pre-order at Amazon and Kobo and soon thourgh the other major ebook stores. You can find the details here: ‘Liath Luachra: The Metal Men Availability
At this stage, it looks as though at least two (earlier) chapters will need to be removed and reworked for use in a separate book in the series (Liath Luachra 5). Unfortunately, I won’t have a title or any kind of release date for that for several months (as I want to complete Fionn: Stranger at Mullán Bán for a June 2022 release).
Some other good news is that interest in the potential television series seems to have raised its head again. That doesn’t mean, of course, that it’ll actually go to green light. There are always at least a dozen or more other variables on those kinds of decisions.
I guess, like Book 5, we’ll just have to wait and see.