They unfortunately do this all the time with trilogies, only the first book. Like for example they just announced the second dark imperium trilogy book but no LE. Castellan didn't get one (though it wasn't that great), etc. Same for the hardback LE trilogies they do. They just do one offs and stop (tanith series, cain). I very much dislike it as well as I don't want to get just the LE for the first one and have the other two be regular books and unfinished trilogy sets. The best thing you can do is let them know that you want them via email to BL support and on their facebook and vote with your wallet. Stop buying LE for the first book in a series as they generally won't get follow up LEs.