That means all of my books still with them will be out of print by then at the latest, as will all the other titles in their catalogue. The LI contract is a periodic one generally renewed every year or two years, and any contracts which expire before May will not be renewed and the title will go out of print at that point. I can't remember off-hand which of my contracts might expire before then, so no guarantees that all of my books will still be available after the end of the year. Skimming last year's contract renewal emails suggests that they'll start to fall out of print around February/March.
I gather the usual Boxing Day sale will be going ahead.
I'd like to say that I'll self-publish to get them back in print, but realistically that's not likely to happen for quite a while, given my current health issues. OTOH, if I do self-publish I'll do so at a significantly lower cover price. In the unlikely event you'd like to buy any of my Loose Id titles and haven't got around to it yet, you'll need to weigh up those options.
I know some of the other authors aren't planning to do new editions of some of their titles, or have put it at the back of a very long "when I have time and energy" queue, so you might want to check out what any favourite authors are planning to do if there are any books you hadn't got to yet and would be sorry to miss out on.
Make sure you have copies of all your purchases downloaded, and that you have cashed in any Id Points, gift certificates etc and claimed any prizes before shutdown.