This is a super good book and builds on the first two books perfectly: yeah, you guessed it, it all kicks off with the Eldritch.
It appears that when you get to book 4, A Rose Point Holiday, that it fits in just before the Epilogue at the end of Laisrathera, so you may wish to pause this book at that point and read the fourth book and then come back to the Epilogue: your choice, as always.
All said and read: great writing, great pacing, great characters, just all round good sci-fi with a nice hint of fantasy tropes courtesy of the Eldritch.
And as with the first two books, i’m going to dive straight into the next book, A Rose Point Holiday. I think it says a lot for a book series when you just pile straight through all the books without any inbetweenie reads.